# Mursalin Habib's Message Board

A couple of people already have their message boards. Here's mine! You can leave messages for me here.

Note by Mursalin Habib
5 years, 6 months ago

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.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. 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 1paragraph 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 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

Sort by:

Now that the HSC results have come out, what have you decided to study as an undergrad?

- 4 years, 1 month ago

- 4 years, 2 months ago

I'm glad to know you are a moderator.

Needed some answer about problem posting rules and their rating system . I've already mailed @Calvin Lin, but didn't get any reply yet. Is there any post on this topic? Would really be helpful if I get the link.

- 4 years, 2 months ago

- 4 years, 2 months ago

Thanks

- 4 years, 2 months ago

Hi :)

I just realized that I have never talked with you ! (other than some small comments here and there)

- 4 years, 7 months ago

@Rahul Saha: I see that you've contributed to the functional equation introduction wiki. Could you clean it up a little bit, fix some of the typos and improve the format?

Thanks!

- 4 years, 9 months ago

I can't seem to find any typos.Maybe someone else edited it.And can you please elaborate on how the format can be improved? I will be happy to make any improvements.

- 4 years, 9 months ago

Your Wiki - Diophantine Equations - Solve by Factoring

In the first example can you please show a proof if a number prime factorization is $a^bc^de^f$ then it will have (b+1)(e+1)(f+1) divisors , I am not getting it

- 4 years, 9 months ago

- 4 years, 9 months ago

@Daniel Lim , are you sure the answer to your problem, "Three Cows" is correct?

- 5 years, 1 month ago

It's wrong. Gonna change it. Really careless mistake.

- 5 years, 1 month ago

This is so embarrassing. This is what I got.

$\frac{1}{20}+\frac{1}{30}+\frac{1}{60}=\frac{6}{60}=\frac{1}{6}$

What have I done?

- 5 years, 1 month ago

I do believe that the answer is incorrect.

- 5 years, 1 month ago

@Sharky Kesa , how did the AMC go? Do you have a favorite problem?

- 5 years, 2 months ago

I was doing the Australian Maths Competition, not the American Maths Competition. It was way easier than I thought it would be. My favourite question probably was the last question.

What is largest 3 digit number such that it is equal to the sum of its hundreds digit, the square of its tens digit and the cube of the units digit?

I am pretty sure I was the only boy in the classroom to get that question (we had female teachers who also did the test as a practice of their skill).

Victor Loh was also participating in this so you can ask him as well.

- 5 years, 2 months ago

How did you approach the problem?

If you look at it, there aren't many cases to consider. Even a brute force approach shouldn't take much time.

- 5 years, 2 months ago

Hmm, yes. I first eliminated the cases for the first digit and last digit. This greatly reduced the number. Then, because I didn't want to get it wrong, I used trial and error to determine the answer.

- 5 years, 2 months ago

@Mursalin Habib Is there any hope of another MCQ set like the "Not As Easy As [1], [2], [3]" set? I really enjoyed it.

- 5 years, 3 months ago

I don't see why not.

However at this exact moment I do not have enough ideas for an entire set. Give it a week.

I'm really glad that you enjoyed the sets.

- 5 years, 3 months ago

@Blake Mitchell , welcome to Brilliant! You should consider following some more people if you want more things in your feed. The search bar is a great way to find a lot of great problems and notes. If you search for "." [the period symbol], you practically pull up everything. Then you can use different filters for problems, sets, topics and levels of difficulties. Enjoy!

- 5 years, 3 months ago

@Abba F , welcome to Brilliant! If you're looking for problems of a specific level, use the search bar. Search for "." [the period symbol] and filter topics, tags and levels. You should also consider following more people if you want to see more stuff appear in your feed. Have you seen this?

- 5 years, 3 months ago

Thanks! I've only been here a couple of days, so it's nice to get some pointers on the infrastructure. I've already found some very interesting sets through Who To Follow.

- 5 years, 3 months ago

@Mayank Holmes , I think your chemistry problems are great! Would you please add a solution to this one?

- 5 years, 4 months ago

@josh silverman , did you know that both of us co-incidentally have the same status? What are the odds! :)

- 5 years, 5 months ago

@Daniel Liu , you're going to destroy the JMO! The problems don't seem that hard. Good luck!

- 5 years, 5 months ago

@Rubayet Tusher , congratulations on leveling up in algebra! I see that you are maintaining your streak for the last couple of days. Why don't you post a problem so that others can give it a shot? And you should seriously consider following some more people.

- 5 years, 6 months ago

@Cody Johnson , I ask this because I'm curious but who is [or was] Oscar Harmon?

- 5 years, 6 months ago

I noticed that your school is Notre Dame College. What's that about?

Staff - 5 years, 6 months ago

'Notre Dame' is originally from French and when translated to English, it means "Our Lady". It is a reference to Mary, the mother of Jesus. The school [or college as it is called here] was founded by the Congregation of the Holy Cross.

The school is very strict about discipline and attendance is 100% compulsory. This part is from Wikipedia:

Notre Dame College gained reputation of the best institution for higher secondary education in the country. The highest number of perfect GPA holders in national examination (H.S.C.) and the exceptional success of its students in university admission tests bear testimony to this.

On the downside, they put too much pressure on you and there's a ton of homework everyday. The school website always seems to be unavailable.

- 5 years, 6 months ago

Ah, I was thinking of that you got into Notre Dame in US. Didn't know that "Notre Dame" meant "My Lady", and that there are several higher education institutions with Notre Dame in their name.

Time to revisit Duolingo to learn French :)

Staff - 5 years, 6 months ago

@Mursalin Habib It says in your profile that you like reading webcomics. My favorite is Homestuck, by Andrew Hussie, and I have included characters from it in a couple of problems (like this one) off of it. Have you heard of it?

- 5 years, 6 months ago

I haven't heard of it, sorry. I'll be sure to check it out!

I like xkcd, spikedmath, abstrusegoose, zenpencils and cyanide and happiness to name a few.

- 5 years, 6 months ago

Ah, I enjoy Cyanide and Happiness as well.

If you want to check out Homestuck, you should probably know that it is really long (almost 6000 pages and counting). It seems really pointless at the beginning, but everything in the beginning will make sense later on. And lastly, know that when you get past all of the weird stuff that happens in it, there lies a really interesting commentary under the surface. Basically, if you're patient enough to read it and you don't mind reading about some really weird characters and events, the hours you spend reading it will be well worth it when you finish.

But if you don't like it, that's fine. Lots of people can't get over the fact that the first 500 pages or so (the pages are really short, sometimes) can basically be summarized by "No one can find any of their belongings."

I hope you like it!

- 5 years, 6 months ago

@Peter Taylor , do I qualify as a person who's worthy of being featured i your "cool people's message boards!" set? :)

By the way, although people can't directly re-share this note, there is a way to re-share this. If you like it, it goes to your "liked" feed and it is re-shareable from there. Are there any plans to fix this [It's really not that important but I'm just putting it out there.]?

- 5 years, 6 months ago

It was so woefully incomplete without you :)

Let me know if other cool people are making message boards, and I'll add them.

Re: the "hacky reshareability of notes published directly to sets" I will add it to our cue of bugs/minor inconsistencies. We will fix it when all other things of higher priority have been fixed(which could be a very long time). E.g. when ever presented with decisions about how to spend our time like "make the website faster" or "block resharing of notes that were published directly to sets" we are always going to go for things that affect more people. Thanks for bringing it up though!

Staff - 5 years, 6 months ago

@Trevor B. Here's your favorite joke with a new twist.

There are 10 types of people in this world.

1) Those who don't know binary.

2) Those who expected the 10 to be in binary.

3) Those who expected the 10 to be in ternary.

4) Those who expected the 10 to be in quaternary.

5) Those who expected the 10 to be in quinary.

6) Those who expected the 10 to be in senary.

7) Those who expected the 10 to be in septenary.

8) Those who expected the 10 to be in octal.

9) Those who expected the 10 to be in nonary.

10) Normal people.

[This joke assumes that normal people know binary and there is no intersection between 1 and 10 :)]

- 5 years, 6 months ago

Here's a trick question that I came up with myself.

What is $1+1?$ Base $10,$ no tricks! $10,$ because the entire question was in base $2.$

- 5 years, 6 months ago

On a related note,

alt text

- 5 years, 6 months ago

Haha, thanks for this! My favorite is the doctor, physicist, and statistician going hunting.

- 5 years, 6 months ago

I was actually going through people's profiles and read that this was your favorite math joke.

- 5 years, 6 months ago

Oh, really? I need to update that then. It's been a really long time since I took a look at that. I'm curious - did you have the willpower to read my entire post on the beauty of mathematics?

- 5 years, 6 months ago

I loved reading it. I like reading other people's profiles when I'm bored.

When was the last time you updated your profile? Because I'm pretty sure there was some mention of Bob Krueger there somewhere [just curious, that's all].

- 5 years, 6 months ago

I think I updated it about two or three months ago.

When I was doing my science fair project, I needed to learn relatively advanced Python in a week, so I asked for some help with the code. He provided a sample code that I used in the project to get second at the county science fair, and I made a mental promise to pay him back by learning Python. The rest is history.

- 5 years, 6 months ago

@Anish Puthuraya So you're a fan of Linkin Park? What is your favorite song by them? What is your favorite album? Have you heard their new new song "Guilty All The Same" from their upcoming album "The Hunting Party"?

- 5 years, 6 months ago

Ive heard that song. They have come back to Rock music after quite a while.

- 5 years, 6 months ago

- 5 years, 6 months ago

In the End, Numb, Waiting for the End.

- 5 years, 6 months ago

Wow these songs are my fav too

- 5 years, 6 months ago

@Tahsin Ahmed You said that you are not a big fan of the MCQ system. Did you try out this set of problems? These problems wouldn't work without the MCQ format and the solutions require proving something as opposed to finding a numerical answer. Let me know what you think of them.

- 5 years, 6 months ago

@Finn Hulse , congratulations on following 3000 people! :) That is an incredible achievement!

- 5 years, 6 months ago

HAHAHAHAHA! Yes... It's quite hard to do! You click on one person, then you click on another, then you click on another, etc.. It's MUCH harder than being followed by 3000 people! Totally... (sarcastic face). :D

- 5 years, 6 months ago

@Fahim Shahriar Shakkhor , nice job being the only person to finish "I Don't Have A Name For This Yet!". Did you like the problems? Which one seemed the hardest to you?

- 5 years, 6 months ago

Pie? and Answer Very Carefully! bothered me much.

I assumed $\pi+e$ to be rational and I almost forgot $0$ is rational. They were really good ones.

- 5 years, 6 months ago

@Daniel Liu , can you post a solution to Classic Climbing Problem 2? It's driving me crazy!

- 5 years, 6 months ago