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kingW3
  • Member for 8 years, 6 months
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25 votes
4 answers
2k views

Nested radicals of 1000 square roots

10 votes
1 answer
299 views

Prove that all light bulbs can't light off

10 votes
2 answers
492 views

When is a Sudoku like table solvable

7 votes
1 answer
231 views

Evaluting sum $\sum \limits_{n=0}^\infty\frac{n^k}{n!}$

6 votes
1 answer
190 views

How many sets $(A_1,A_2,\cdots, A_k)$ which are subsets of $\{1,2,\cdots ,n\}$

6 votes
4 answers
211 views

Solve equation $\frac{1}{x}+\frac{1}{y}=\frac{2}{101}$ in naturals

5 votes
2 answers
2k views

Chess rook problem

4 votes
1 answer
223 views

Why is infinite Integration by Parts valid?

4 votes
4 answers
144 views

Using basis $e=[x^3,x^2,x,1]$ instead of $e=[1,x,x^2,x^3]$

3 votes
1 answer
96 views

Prove $fgh$ has more then $\deg f$ different zeroes

3 votes
1 answer
3k views

Two circles touch internally

3 votes
1 answer
219 views

Cyclic quadrilateral geometry

3 votes
2 answers
356 views

Proving $a\mid b^2,\,b^2\mid a^3,\,a^3\mid b^4,\ldots\implies a=b$ - why is my approach incorrect

3 votes
1 answer
60 views

Biggest common divisor

3 votes
3 answers
70 views

Given a continuous mapping $f$ find $\lim_{n\to\infty}\int_0^1 nf(x)e^{-nx}$

2 votes
2 answers
158 views

Material for advanced highschooler

2 votes
1 answer
182 views

Lerch transcendent: $\text{LerchPhi}^{(0,1,0)}\left(\frac{1}{2}, 0, 2\right)$

2 votes
1 answer
1k views

Minimum number of knights so that every cell is attacked

2 votes
0 answers
165 views

Biggest number divisible by $99$

2 votes
2 answers
44 views

Finding the interval after substitution

2 votes
1 answer
368 views

Multivariable limit one-sided path

2 votes
2 answers
136 views

Proving $x>\sin(x)$ without calculus for $x>0$

2 votes
1 answer
1k views

Find invertible matrices $P,Q$ such that $A^0=PAQ$

2 votes
1 answer
92 views

Biggest number of creatures in forest

2 votes
1 answer
100 views

Intuition behind the formula for number of graphs with $n-3$ bridges

1 vote
0 answers
71 views

Finding $(x,y)$ closest to $N$ points

1 vote
1 answer
71 views

Are given groups isomorphic

1 vote
1 answer
90 views

Elementary solution to $4^x-25^y=39$ in natural numbers

1 vote
2 answers
76 views

Compare $4^x+1$ and $2^x+3^x$ for non-negative real $x$

1 vote
0 answers
81 views

Solving system of equations in rationals