# Yiyuan Lee

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bio website codemyroad.wordpress.com location Singapore age 17 member for 10 months seen 1 hour ago profile views 740

I'm an 18-year old boy, currently studying in high school and chasing my passions in programming and mathematics in my free time.

I firmly believe that fluency and experience in these two areas transcends a person's age, and am therefore pitting myself against the standards of the professionals and the specialists.

 252 Visually stunning math concepts which are easy to explain 124 Visually stunning math concepts which are easy to explain 17 Product of logarithms, prove this identity. 17 If n is a positive integer, then $n^3 + 5n$ is divisible by $6$. 13 Show that the last four digits of $2013^k$ are 0001

# 7,523 Reputation

 +30 Proving $\frac{1}{\sin^{2}\frac{\pi}{14}} + \frac{1}{\sin^{2}\frac{3\pi}{14}} + \frac{1}{\sin^{2}\frac{5\pi}{14}} = 24$ +5 Drawing the longest line segment contained in an area +10 Prove one case of the Reverse Triangle Inequality $|x-y|≥|x|-|y|$ for all reals $x$ and $y$ +10 Indirect proof , odd and even numbers

# 32 Questions

 9 Drawing the longest line segment contained in an area 8 GCD of $a^n + b^n$ and $c^n + d^n$ 5 Can the limit $\lim_{h \to 0}\frac{f(x + h) - 2f(x) + f(x - h)}{h^2}$ exist if $f'(x)$ does not exist at $x$? 4 Strategies to guess choices for multiple choice questions 4 Finding the value of $(bc-ad)(ac-bd)(ab-cd)$

# 115 Tags

 122 elementary-number-theory × 37 29 number-theory × 22 87 calculus × 35 29 trigonometry × 16 53 sequences-and-series × 24 26 modular-arithmetic × 8 49 algebra-precalculus × 25 25 inequality × 15 41 divisibility × 11 25 induction × 9

# 5 Accounts

 Mathematics 7,523 rep 41439 Physics 285 rep 8 Stack Overflow 282 rep 313 Chemistry 116 rep 4 Computer Science 101 rep 1

 Nice Answer × 12 Deputy Curious Good Answer × 2 elementary-number-theory Disciplined Enlightened × 3 Fanatic Great Answer × 2 Reviewer × 4

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