Top network posts

• 11 Max product of $20$ numbers with mean $12$ if $n$-th number is $\frac{n}2$ or $2n$?
• 8 Prove that the product of any two numbers between two consecutive squares is never a perfect square
• 6 How can I simplify $(4ab^{-1})^{-2}$
• 6 exist infinitely many positive integers $n$ such $\omega (n)+\omega (n+1)\equiv 0\pmod 3$
• 6 Proof that $x^{(n+4)} \mod 10 = x^n \mod 10$
• 6 How is the missing digit calculated?
• 6 For any positive integer $n>3$, there exists at least $1$ integer $k$ such that $n+k$ and $n-k$ are primes.
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