Mathathon 2021

If you don't know what the Mathathon is, its a contest I started on Brilliant.org, where I post Math and Logic problems of varying difficulty, and score the solution that the participants create. Highest score wins. You can check my Profile for my posts on the Mathathon 2020.

So, the last Mathathon was held in the second half of 2020, somewhere around July-August I reckon, but this time, I'm gonna hold it in the March-April period because I will be very busy after then (Busy studying, surely not playing games).

I have changed up some things, and this Mathathon will be better planned than the last one.


MATHATHON 2021\large \text{MATHATHON 2021}

The Mathathon 2020 was a contest where I post a series of problems and score the solutions. The Mathathon 2021 is the same, except we have different rules.

I shall add the number of problems and the posting scheldule below later (coz its a draft), and you can solve them at anytime you want.

(I dunno what to do now, I am really bad at this hosting thing...)

Your solution will be graded as follows -

Accuracy - 1010 points

Readability - 1010 points

Ingenuity - 1010 points

Bringing us to a total of 3030 points. (Bonus points if you say you love the Dream SMP!)

(I was kidding, if you didn't get it...)

(Now, the last time I had included time zones and Latex and all that sh*t, and in retrospect, that was a very stupid idea, so this time, I will try to be a more...um...a person with more IQ, coz I'm big-brained, yeah...)

Accuracy is basically correctness. Whether every calculation, assumption, or the final answer is correct.

Readability is neatness and clarity. Your solution must be clear and easily understandable, organized, not a clutter of numbers if you want to score here. Latex, images and GIF's are all included in this part. Unnecessary images, Latex or GIF's will not be awarded more points.

Ingenuity is your method of solving the problem. For this, my friends and I (Yes, I have friends...) will each make a solution for the problem. The most used solution will be counted as the most common solution, so if your solution sways away from the common solution, you score here. Your solution should make people go 'Aha!' or 'Clever trick!' to score here.

My friends are all smart, and I've told them about this, so they're not messing around and are taking this seriously. No bias will be allowed in this contest.

(I'm an anti-social person, so I've got 55 friends, don't judge.)


Problem schedule :

Problems 1,2,31, 2, 3 and 44 will be released on 22nd22nd March and will be of easy difficulty.

Problems 5,6,75, 6, 7 and 88 will be released on 24th24th March and will be of medium difficulty.

Problems 99 and 1010 will be released on 26th26th March and will be of hard difficulty.

All solutions posted on or before April 1st1st will be considered. I will send out the results on April 2nd2nd.


If you haven any queries or issues, please comment here

If you would like to view the list of participants and their points, go here

If you want the links of the problems and discussions related to the Mathathon, go here


Announcements -

25 members have joined, no more members may join. If someone drops out, members in order of time priority may join.

There is a new judge, Jason Gomez! He will help me with the scoring. He is not participating. No more judges will be allowed now!

Note by Percy Jackson
1 month, 2 weeks ago

No vote yet
1 vote

  Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

  • Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
  • Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
  • Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.
  • Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

  • bulleted
  • list

1. numbered
2. list

  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 2×3 2 \times 3
2^{34} 234 2^{34}
a_{i-1} ai1 a_{i-1}
\frac{2}{3} 23 \frac{2}{3}
\sqrt{2} 2 \sqrt{2}
\sum_{i=1}^3 i=13 \sum_{i=1}^3
\sin \theta sinθ \sin \theta
\boxed{123} 123 \boxed{123}

Comments

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Top Newest

Anyone can join. I will allow the first 2525 members that join to participate, no more because I am not Simon Cowell. If you wish to join, reply to this comment saying you want to join. Please follow discipline and comment as a reply, because if I don't see your comment in the replies, I won't add you, even if you commented elsewhere on my note. Your comment format should be as follows -

I want to join.

No, I'm kidding just type whatever you want...

Percy Jackson - 1 month, 2 weeks ago

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I want to join

No, I'm kidding just type whatever you want...

Jason Gomez - 1 month, 2 weeks ago

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bruh lol ok I'll add you once I complete this :)

Percy Jackson - 1 month, 2 weeks ago

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I want to join.

Newton KAYODE - 1 month, 1 week ago

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Okay, I will add you once I complete this.

Percy Jackson - 1 month, 1 week ago

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Comments Subscribe Sort by:TopNewest 1 0 Anyone can join. I will allow the first 2525 members that join to participate, no more because I am not Simon Cowell. If you wish to join, reply to this comment saying you want to join. Please follow discipline and comment as a reply, because if I don't see your comment in the replies, I won't add you, even if you commented elsewhere on my note. Your comment format should be as follows -

I want to join.

No, I'm kidding just type whatever you want...

Percy Jackson - 1 day, 17 hours ago Hide 2 Replies Reply I want to join No, I'm kidding just type whatever you want...

Jason Gomez - 1 day, 7 hours ago Hide 1 Reply Reply bruh lol ok I'll add you once I complete this :)

Percy Jackson - 1 day, 7 hours ago Hide 1 Reply Reply @Percy Jackson – Thanks :)

Jason Gomez - 21 hours ago Hide 1 Reply Reply @Jason Gomez – @Percy Jackson, will I participate ?

Newton KAYODE - 21 hours ago Hide 1 Reply Reply @Newton Kayode – Mostly you will, percy will tell you once he comes online

Jason Gomez - 21 hours ago Reply I want to join.

Newton KAYODE - 21 hours ago Hide 1 Reply Reply Okay, I will add you once I complete this.

Percy Jackson - 3 hours ago Reply

Write a comment or ask a question...

i want to join

NSCS 747 - 1 month, 1 week ago

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What the hell dude...I'll add you once this is done...

Percy Jackson - 1 month, 1 week ago

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Mwah hah hah!

Jeff Giff - 1 month, 1 week ago

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u have discord? ill delete this once u reply

NSCS 747 - 1 month, 1 week ago

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Yes, why?

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson friend me my user is: NSCS_737#2887

NSCS 747 - 1 month, 1 week ago

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@Nscs 747 Can't because of this

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson so your telling me you have 1000 friend requests or friends? there is a useful invention called ignore all and unfriend lol

NSCS 747 - 1 month, 1 week ago

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@Nscs 747 I will not unfriend all my actual friends just to add you. I'll check for useless old friends and stuff. Its mostly because of the repl.it discord, most of them are my friends lol

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson im not saying unfriend everyone.. just unfriend one person that hasnt been on for like a yaer or something

NSCS 747 - 1 month, 1 week ago

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@Nscs 747 I'll try but looking for one friend that's offline in a 1000 is like searching for a needle in a 1000 haystacks.

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson goto freindslist and scroll al the way to bottom and unfreind person at very bottom

NSCS 747 - 1 month, 1 week ago

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I want to join.

Avner Lim - 1 month, 1 week ago

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I will add you when this is done!

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson Thanks!

Avner Lim - 1 month, 1 week ago

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I want to join.

Aditya Mittal - 1 month, 1 week ago

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Will add you once its done :)

Percy Jackson - 1 month, 1 week ago

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George not found is underrated

Aryan Raj - 1 month ago

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Haha, he is. You're in the contest!

Percy Jackson - 1 month ago

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I want to join.

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You didn’t spam...

Jason Gomez - 1 month ago

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@Jason Gomez So, did I spam?

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@Siddharth Chakravarty Ofc you didn’t even I said the same

Jason Gomez - 1 month ago

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@Jason Gomez Haha, I see what you did just now, tit for tat :)

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@Siddharth Chakravarty Lol, I imagine Percy Jackson being extremely confused reading this

Jason Gomez - 1 month ago

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@Jason Gomez visible confusion

Percy Jackson - 1 month ago

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I want to join

Sundar R - 1 month ago

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This seems interesting, I want to join

Devbrat Dandotiya - 1 month ago

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I want to join.

Or do I? (yes I actually do that was a joke).

Kevin Long - 1 month ago

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I am willing to join

Omek K - 1 month ago

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But I am not good with writing solutions in the website can I send it your email

Omek K - 1 month ago

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No, I'm kidding just type whatever you want...

WHATEVER YOU WANT

Anyways i am interested... Nice initiative

Siddhesh Umarjee - 1 month ago

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i want to join

Praveen B - 1 month ago

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I want to join

Hamana Hamana - 1 month ago

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Admissions are closed, unless someone drops out no more will be allowed

Jason Gomez - 1 month ago

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I want to join.

yera kim - 1 month ago

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Unfortunately all 25 places have been taken, if a participant doesn’t intend to participate later, I will notify you :)

Jason Gomez - 1 month ago

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thank you very much to the MATHATHON 2021 team for their effort.
i enjoy the Mathathon problems very much.

num IC - 3 weeks, 2 days ago

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Thanks @num IC ! We're glad you enjoy the problems so much!

Percy Jackson - 3 weeks, 1 day ago

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Admissions are closed, unless someone drops out no more will be allowed

Jason Gomez - 1 month ago

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please? I'm 14 and kind of smart

Daniel Moore - 1 month ago

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you still can solve the questions but keep the explanations until someone drops out or the mathathon is over.

num IC - 1 month ago

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I will let you know if you can join (some participants are not really active, and might want to drop out later)

Jason Gomez - 1 month ago

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@Daniel Moore You are in! Please respond to this message to confirm your participation (and also anybody else who thinks this formal tone is cringe)

Jason Gomez - 3 weeks, 4 days ago

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@Jason Gomez 'Formal tone' Cringe

'Informal tone' Pog

'I'mma say whatever I want tone' POGCHAMP!

lmao

Percy Jackson - 3 weeks, 4 days ago

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@Jason Gomez Reply

Daniel Moore - 3 weeks, 3 days ago

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@Daniel Moore @Percy Jackson Yup he’s in

Jason Gomez - 3 weeks, 3 days ago

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@Jason Gomez Okay, I'll add the kinda smart fella.

Percy Jackson - 3 weeks, 2 days ago

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@Daniel Moore Informal- You can try out the Mathathon questions and give solutions to them now

Formal-Do try out the Mathathon questions and if possible give solutions too

Jason Gomez - 3 weeks, 3 days ago

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Hey!! By when should we be expecting the judging🙄

Siddhesh Umarjee - 1 week, 6 days ago

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Ig they are testing our patience as well

Agent T - 1 week, 6 days ago

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lmao

Kevin Long - 1 week, 6 days ago

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hmmmmmm XD

Siddhesh Umarjee - 1 week, 6 days ago

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Is dream so popular now? Oh god... I love minecraft!

Jeff Giff - 1 month, 1 week ago

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Dream and the Dream SMP. They literally dominated 2020, and the Dream SMP is coming to its final stages, with Dream proving that he has a revival book.

Percy Jackson - 1 month, 1 week ago

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Oh I simply know about manhunt... not interested in the Dream SMP. Users are mad about manhunt in China but see, China has its own free minecraft (after negotiating with bruh) so you’ll know nothing about that :)

Jeff Giff - 1 month, 1 week ago

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@Jeff Giff Oh, ok lol the manhunt series is great but the Dream SMP series is absolutely the best work of fiction ever known. It is literally an in-game movie. You should see a few summaries on the series and a few animatics as well!

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson Yeah, like... NO! NOT THE PRIME LOG! *TNT explodes *

Jeff Giff - 1 month, 1 week ago

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@Jeff Giff lol I'd suggest animativs by SAD-ist and summaries by EvanMCGaming

Percy Jackson - 1 month, 1 week ago

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@Percy Jackson And then we have *dream blew up * WAIT! This isn’t in the script!!

Jeff Giff - 1 month, 1 week ago

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@yera kim - You are in the contest!!!

Percy Jackson - 1 month ago

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This might take a month to prepare :) I’m in!

Jeff Giff - 1 month, 1 week ago

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Sure, you'll be in once I finish this.

Percy Jackson - 1 month, 1 week ago

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@Jeff Giff, @NSCS 747 - Can you please delete your unnecessary comments, I would like this note clean so that I don't have to search through too many messages :)

Percy Jackson - 1 month ago

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can i also help with your judging stuff

NSCS 747 - 1 month ago

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Uh...I said only 2 judges, I'm not sure having 3 judges will be very convenient.

Percy Jackson - 1 month ago

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@Percy Jackson i can keep track of like who submitted a response and stuff like a roll marking for each question i guess?

NSCS 747 - 1 month ago

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@Nscs 747 Ok, if you want to :)

Percy Jackson - 1 month ago

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@Percy Jackson k what is the list of members

NSCS 747 - 4 weeks ago

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@Nscs 747 It is given in the Members and Points note. The link is up in the official note.

Percy Jackson - 4 weeks ago

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@num IC , @Reyna (Sarah Alam), @Pixel-girl - Wanna join???

Percy Jackson - 1 month ago

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Want to call David Vreken, Siddarth and Vinayak? They might want to join

Jason Gomez - 1 month ago

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Yeah, I'll mention them too. I'm posting this link in today's dc (BM allowed me to)

Percy Jackson - 1 month ago

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@Percy Jackson Oh nice

Jason Gomez - 1 month ago

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@Percy Jackson I’ll put in my solution too if I put one up

Jason Gomez - 1 month ago

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@Jason Gomez Ok, thanks :)

Percy Jackson - 1 month ago

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Is sir Zakir Husain in as well?

Jeff Giff - 1 month ago

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I will mention some more people later. Zakir Husain will be mentioned.

Percy Jackson - 1 month ago

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Yes! I’d love to participate, thanks for mentioning me!

Sarah Alam - 1 month ago

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Great!!! I'll add you to the members list!

Percy Jackson - 1 month ago

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I’d love to participate

num IC - 1 month ago

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@Zakir Husain, @Siddharth Chakravarty, @Vinayak Srivastava, @David Vreken - Would you like to participate?

Percy Jackson - 1 month ago

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Sure

Zakir Husain - 1 month ago

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Great, I'll add you!

Percy Jackson - 1 month ago

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OK, but my offline school class will start from April, so maybe I won't be much active but I'll try.

Vinayak Srivastava - 1 month ago

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Oh, it will end till 1st April. I did not read it completely. Count me in!

Vinayak Srivastava - 1 month ago

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I will be too busy then and will have to decline, but I appreciate the invite!

David Vreken - 1 month ago

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Okay :)

Percy Jackson - 1 month ago

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Count me in!!

Atin Gupta - 1 month ago

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Sure, I'll add you!

Percy Jackson - 1 month ago

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Thanks :)

Atin Gupta - 1 month ago

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I was just wondering whether BM will want to join, they just shouldn’t put staff solutions up in your problems, nor delete other solutions to win that’s all... and not cheat to get the answer right, okay yeah they have too much power

Jason Gomez - 1 month ago

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What if BM is an account used by multiple staff members?

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And why are you assuming Brilliant Mathematics is a ‘he’?

Sarah Alam - 1 month ago

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I didn’t assume the account is owned by a he

Jason Gomez - 1 month ago

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when the gender of a person is not known, or you don't want to mention the gender, the pronoun used shall be 'they'.

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@Siddharth Chakravarty That’s what I put...

Jason Gomez - 1 month ago

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@Jason Gomez Let call Brilliant Mathematics IT, so we aren’t talking about a thing or object, but a Brilliant Mathematics. We aren’t sure whether IT is a he or she or they, so we call IT, ‘IT’. e.g. IT will make a solution. IT has too much power. IT will delete the comment. e.t.c

Sarah Alam - 1 month ago

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This is for @Sarah Alam, i edited the comment

Jason Gomez - 1 month ago

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@Brilliant Mathematics - Wanna join? (don't cheat tho)

Percy Jackson - 1 month ago

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I have to pass.

Brilliant Mathematics Staff - 1 month ago

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@Brilliant Mathematics Ok, there's 25 already anyways :)

Percy Jackson - 1 month ago

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There, all your questions will be answered, I mentioned BM.

Percy Jackson - 1 month ago

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Aargh you beat me to it :D

Jeff Giff - 1 month ago

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I want to join

Vishwajeet Prasad - 1 month ago

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Put this as a reply to the top comment instead and delete this comment

Jason Gomez - 1 month ago

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I am willing to participate

Omek K - 1 month ago

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But I am not that good with writing solutions in the website but can I send it to your email, if possible then I am willing to participate

Omek K - 1 month ago

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I am pretty sure this would go against the spirit of the competition (everyone needs to see your solution, so that they can agree Percy isn’t biased) and also I am very sure he wont be willing to share his email id with you because we are on an online platform

Jason Gomez - 1 month ago

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@Jason Gomez Ok but still I will participate and I will try using latex, you can include my name

Omek K - 1 month ago

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@Omek K Surely

Jason Gomez - 1 month ago

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@Jason Gomez Thank you

Omek K - 1 month ago

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@Omek K @Omek K - This is in my opinion the best Latex guide on the platform. You can check for latex codes there and use them. If you have any questions about Latex, you can ask me :)

Percy Jackson - 1 month ago

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@Percy Jackson Thank you

Omek K - 1 month ago

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I would like to join.

Morris Pearl - 1 month ago

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Hi Percy! This sounds challenging and fun. I am interested in participating if I can still join. LaDonna Carrington

LaDonna Carrington - 1 month ago

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On second thought, it is best that I do not enter, I am going to be very busy the net few months. Thankyou.

LaDonna Carrington - 1 month ago

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I want to join if still possible. Thanks

Guillaume MARTIN - 1 month ago

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I would love to join if it is possible Thanks !

Balthazar Martin - 1 month ago

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Hi Percy I appoligize if my english sounds weird. It's my fourth language. I am kind of new here, but i'm genuanlly delighted, that you and your friends sacifice your free time to organize this Mathoton. Since only 25 People can participate, i would be very thankful if you and your friends could post the Problems after the Mathoton has taken place. Thank you for considering my suggestion.

Best reagards. -lekonda

Lekonda Sagon - 1 month ago

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All problems posted can be solved by everyone, it will all be in Percy's homepage, but only those who are in Mathathon can submit solutions to be graded, you can attempt all the problems if you want, but it would be preferable if you put down your solution after 2nd April (25 solutions is itself a huge number to grade, extra solutions coming in might just increase the time spent in searching for the solutions to be graded) , and by the way your English is better than mine :)

Jason Gomez - 1 month ago

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All 25 participant spots have been occupied! No more applications will be accepted now. All the 25 names have been listed in the members and points note!

Percy Jackson - 1 month ago

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How to write in such a big font?

Atin Gupta - 1 month ago

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Use hashtag # in the beginning

Jason Gomez - 1 month ago

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@Jason Gomez

Thanks

Atin Gupta - 1 month ago

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@Atin Gupta

huh

Kevin Long - 1 month ago

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@Kevin Long

ok

Kevin Long - 1 month ago

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@Kevin Long

enf hue

Kevin Long - 1 month ago

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@Kevin Long

so it works with spaces ok

Kevin Long - 1 month ago

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@Kevin Long

and if # you put another

Kevin Long - 1 month ago

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@Kevin Long it does nothing

Kevin Long - 1 month ago

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@Kevin Long

If you put double or triple or other kinds of combinations involving # (also you can put hashtags in the end) you can type the other type of headings

Jason Gomez - 1 month ago

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@Jason Gomez

test

Kevin Long - 1 month ago

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@Kevin Long

test4

Kevin Long - 1 month ago

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@Kevin Long

test2

Kevin Long - 1 month ago

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@Kevin Long test###

Kevin Long - 1 month ago

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Where can you find the problems when you post them?

Kevin Long - 1 month ago

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You can find them in Percy’s homepage and my homepage (practice problems only from mine) and all links will be mentioned in the Mathathon links note which is also in Percys homepage

Jason Gomez - 1 month ago

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This is Mathathon Links

Jason Gomez - 1 month ago

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@Jason Gomez thxs

Kevin Long - 1 month ago

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NO!!!! I'm so sad!! I really wanted to participate, I even put your draft in my favorites (when you asked the permission of staff to publish about it some 2 weeks ago), but there was no note back then that there would be a maximum of participant... Well, maybe next year! ;) Keep up the good work and I hope we will be able to at least see the different problems of this year even if we don't participate! Wish you the best, really a great project! :D

Julie Éthier - 1 month ago

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Thanks! I won't be making this next year. I'll be too busy. I'll ping you if a participant goes out so that you can join :)

Percy Jackson - 1 month ago

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@Julie Love-Brilliant - A member has dropped out because of some reasons. You're in!!!

Percy Jackson - 1 month ago

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@Percy Jackson Percy Jackson you really are the best! Well I already knew that, but now you know that I knew! ;)

Julie Éthier - 1 month ago

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@Julie Éthier congrats! you took the spot i opened i hope you do well i pulled out cus i dont really have much time on brilliant to do this challenge

NSCS 747 - 1 month ago

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@Julie Éthier lol thanks :)

Percy Jackson - 1 month ago

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how can you write a sentence and put it into a numerator with the spaces

Kevin Long - 1 month ago

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\(\dfrac{\text{numerator sentence}}{\text{denominator sentence}}\) -> Copy this code and use it :)

Percy Jackson - 1 month ago

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then how did you write it out isn't then going to be (\dfrac{\text{numerator sentence}}{\text{denominator sentence}})

Kevin Long - 1 month ago

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@Kevin Long oh wait comments have no latex

Kevin Long - 1 month ago

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@Kevin Long Comments do have latex. I used a trick to remove formatting :)

Percy Jackson - 1 month ago

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@Kevin Long That code displays this - numerator sentencedenominator sentence\dfrac{\text{numerator sentence}}{\text{denominator sentence}}

I used a secret trick to remove the latex formatting :)

Percy Jackson - 1 month ago

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@Percy Jackson what's the trick and how do I find my id number cause there's a page with it

Kevin Long - 1 month ago

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@Kevin Long no, its way more complicated.

Percy Jackson - 1 month ago

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@Percy Jackson ok

Kevin Long - 1 month ago

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@Percy Jackson yay I did it my solutions now done

Kevin Long - 1 month ago

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@Percy Jackson how do you make the font smaller though

Kevin Long - 1 month ago

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@Kevin Long add a \small before the \text{}

Percy Jackson - 1 month ago

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@Percy Jackson ok

Kevin Long - 1 month ago

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@Percy Jackson then is there a \large

Kevin Long - 1 month ago

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@Kevin Long yes, it makes large text. There is \Large, \LARGE, \huge and \Huge also

Percy Jackson - 1 month ago

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what is the difference between \frac and \dfrac?

Atin Gupta - 1 month ago

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@Atin Gupta \dfrac is just a short way of writing \displaystyle\frac which makes the styling a bit better for the fraction

12\frac{1}{2} This is \frac

12\dfrac{1}{2} This is \dfrac

Percy Jackson - 1 month ago

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@Percy Jackson Okay :)

Atin Gupta - 1 month ago

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I want to join it too!

soheil gh - 1 month ago

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There are currently 25 participants and 2-3 people in the waiting list. Low chance that so many people will drop out, but if they do, I'll ping you :)

Percy Jackson - 4 weeks, 1 day ago

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@Percy Jackson When will the last two problems be posted?

Aditya Mittal - 3 weeks, 1 day ago

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In some time I will post.

Percy Jackson - 3 weeks, 1 day ago

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@Percy Jackson, I think this type of contest would have been better lol

Vinayak Srivastava - 2 weeks, 3 days ago

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lol I didn't know this existed, thanks for sharing, it is hilarious :P

Percy Jackson - 2 weeks, 3 days ago

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Hey Percy, I really appreciate that you're taking the time to make this possible and would very much like to join in. Best, Oskar

Oskar Dobroczek - 1 month ago

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Thanks! I have added you to the contest!!!

Percy Jackson - 1 month ago

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Great, thx!

Oskar Dobroczek - 1 month ago

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