Top Network Posts

• 11 Max product of $20$ numbers with mean $12$ if $n$-th number is $\frac{n}2$ or $2n$?
• 7 Prove that the product of any two numbers between two consecutive squares is never a perfect square
• 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.
• 6 Show that $x^5+x+1=0$ has a solution in $\mathbb{R}$
• 6 Sixth grade math (number related) problem
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