Top network posts

• 14 $52$ cards reciprocal sum probability
• 13 Triangle angles.
• 13 How many different functions we have by only use of $\min$ and $\max$?
• 8 A curious property of $\operatorname{frac}(e\cdot k)$
• 7 Is it true that for any square matrix $A$, if $A^4=\text{Id}$ then $A^2=-\text{Id}$ or $A^2=\text{Id}$?
• 5 Choosing 26 of 52 cards, reciprocal probability.
• 5 If $A \subseteq \mathbb{N}$, $2^n \in A$ and if $x\in A$, then $\lfloor \sqrt{x} \rfloor \in A$. Is it true that $A=\mathbb{N}$?
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