All values $n$ s.t. ${1 \over x} + {1 \over y} = {1 \over n}$ has exactly 5 solutions
10753
Natural number solutions to $\frac{xy}{x+y}=n$ (equivalent to $\frac 1x+\frac 1y=\frac 1n$)
112575
Finding integer solutions of $m^2-n^5 = m - n$
109224
Accumulation points of $\{ 2^{-n} + 5^{-m} : n,m \geq 1 \}$
108941
Combinatorics Question Asking How Many Integer Solutions Given Different Restrictions
156266
Solving $|x-2| + |x-5|=3$
1001
Number of integer solutions of $x^2 + y^2 = k$
41364
How to prove that $x^y - y^x = x + y$ has only one solution in positive integers?
144765
Solving $\sqrt{x+5} = x - 1$
51445
Number Theory: Find all solutions of $\phi(n)=16$ and $\phi(n)=24$
28594
Number of integer solutions of the following equation
80843
Find all solutions to $x^9 \equiv 25 \pmod {29}$
26081
What will be total number of solutions of $a+b+c = n$?
140763
How to prove that $\sum_{n=1}^{2012} \frac{1}{x_n} = 1 $ has finitely many solutions for positive integer $x_i$?
153170
Find the number of solutions of the equation $e^{4x}+e^{3x}-4e^{2x}+e^x+1=0$
148217
A polynomial with integer coefficients that attains the value $5$ at four distinct points
72857
Find the number of integral solutions of $2x + y + z = 20$?
33314
How many non-negative integer solutions does $x_1+x_2+\cdots+x_n=A$ have?