Calvin Lin
Reputation
86/100 score
3 39 104
Impact
~441k people reached

 68 Is there any branch of Mathematics which has no applications in any other field or in real world? 41 Prove that none of $\{11, 111, 1111,\dots \}$ is the perfect square of an integer 32 Is the number $0.112358132134…$ rational or irrational? 30 Why can't you square both sides of an equation? 30 Surprising identities / equations

### Reputation (33,742)

 +10 Polynomials Question: Proving $a=b=c$. +5 Odd perfect squares whose decimal representation consist only of 1's and o's +10 A 20 × 20 × 20 cube is built of 1 × 2 × 2 bricks. Prove that one can pierce it by a needle without piercing a brick. +10 Internal polygon formed by drawing diagonals in a regular polygon

### Questions (14)

 212 Surprising identities / equations [closed] 29 When is $2^n \pm 1$ a perfect power 24 Odd perfect squares whose decimal representation consist only of 1's and o's 19 For polynomial $f$, does $f$(rational) = rational$^2$ always imply that $f(x) = g(x)^2$? 16 Comparing sums of surds without any aids

### Tags (244)

 450 elementary-number-theory × 115 206 geometry × 112 293 combinatorics × 125 172 contest-math × 66 272 algebra-precalculus × 72 153 real-analysis × 48 238 number-theory × 82 149 sequences-and-series × 44 221 inequality × 74 146 linear-algebra × 61

### Accounts (2)

 Mathematics 33,742 rep 339104 Area 51 151 rep