Set of problems from Thailand 1st round math POSN (help mehhh)

It's almost a year passed, but I still can't do these problems. Most of them I already did it, but I will still post it anyway. There're 4 main topics and Inequalities for the glory of satan of course.

I'll be translating these problems in English for you. Might take about 10 minutes each topics.

Please help mehhh!

Thanks!

P.S: Every single note I wrote it as 2014, which is supposed to be 2013. I can't change it lol. =="


Please post a full solution to these notes instead, not on this note. Someone even did the problem before I finished translating. It was expected to be 3-hour test! =..="

Geometry (I did 1 and 3, the rest are stuck midway)

Algebra (I did 1 (bashing) and 2.1)

Inequalities (I did only 1)

Number Theory (can't remember anything I did)

Combinatorics (I did all of them except 3, and 5 seems to be wrong)

Note by Samuraiwarm Tsunayoshi
5 years, 1 month 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

Sort by:

Top Newest

For the first one, I have transformed the
Quadrilateral into a rectangle of the same area. But am having difficulty in transforming the rectangle into a square.

A Former Brilliant Member - 5 years, 1 month ago

Log in to reply

×

Problem Loading...

Note Loading...

Set Loading...