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• 32 Geometric mean of reals between 0 and 1
• 29 Is this kids experiment a legitimate way to show that air has mass?
• 23 A triangle determinant that is always zero
• 14 How to find sums like $\sum_{k=0}^{39} \binom{200}{5k}$
• 14 What is the closed form for $S=\sum_{n=1}^{\infty} \frac{\sin ({n})}{n!}$?
• 14 An ant on an infinite chessboard
• 13 Evaluate $\int_{0}^{\large\frac{\pi}{4}} \ln {(\sin x)}\cdot\ln {(\cos x)} \left(\frac{\ln{(\sin x)}}{\cot x}+\frac{\ln {(\cos x)}}{\tan x}\right)dx$
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