What did I do wrong in my proof that 2/(3-2/(3-2/(3-... = 1?
41832
Continued fractions paradox
90916
Prove that if $3\mid a^2+b^2$ then $3\mid a$ and $3\mid b$.
37093
If p is an odd prime, prove that $1^2 \times 3^2 \times 5^2 \cdots  \times (p-2)^2 \equiv (-1)^{(p+1)/2}\pmod{p}$
77076
Proof that $(x-1)^2$ divides a $nx^{n+1} – (n+1)x^{n}+1$
104828
Show that $\cot \frac{\pi}{2m}\cot \frac{2\pi}{2m}\cot \frac{3\pi}{2m}...\cot \frac{(m-1)\pi}{2m}=1$
4340
Why does $1+2+3+\cdots = -\frac{1}{12}$?
70625
Prove By Induction $1 + 1/2 + 1/3 + ... + 1/(2^n) ≥ 1 + n/2$
54260
Int division: Why is the result of 1/3 == 0?
56169
What mistakes, if any, were made in Numberphile's proof that $1+2+3+\cdots=-1/12$?
16172
My proof of $I \otimes N \cong IN$ is clearly wrong, but where have I gone wrong?
82913
Is this a proof of Fermat's Last Theorem where n = 3?
54055
Proof $\prod_{i = 1}^n \frac{n + i}{2i-3} = 2^n(1-2n)$ using inducction
138894
Prove that if $3\mid(a^2+b^2)$,then $3\mid a$ and $ 3\mid b$
64457
Prove:$|x-1|+|x-2|+|x-3|+\cdots+|x-n|\geq n-1$
36503
Nicomachus theorem proof - what did I do wrong?
55437
When does $2^{n}$ divide $3^{n}-1$
94516
If $3$ divides $a^2 + b^2$, then $3$ divides $a$ and $3$ divides $b$