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The Demonix _ Hermit

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10 Maximum value of $x$ such that $3^x-2^n$ is a prime. Sep 30 '19
8 If $a+b = 2020$ and $ab$ is a multiple of $2020$ , find all pairs of $(a,b)$ Dec 6 '19
8 How to prove $x^4+2x^2y^2+y^4\geq2xy^3$ Dec 19 '19
7 Find maximum of $C=2(x+y+z)-xy-yz-xz$ Dec 22 '19
7 For what values of n is $2^{2n} -1$ divisible by $4n+1$ Sep 27 '19
6 Solve $x^2+3y = u^2$ and $y^2+3x=v^2$ in positive integers. Jul 22 '20
6 Find all n such that $3^{(2n-1)}-2^{(n-1)}$ is perfect square Dec 18 '19
6 Solve the equation exponential radical Nov 27 '19
5 Prove that $3^{2015}-2^{2015}>2016^2$ Nov 21 '19
5 $\frac{x}{y}-\frac{y}{x}=\frac56$ and $x^2-y^2=5$ Dec 22 '19
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