How many times can you subtract the number two from the number fifty?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Take away the whole and some still remain. What is it?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

What question can you never answer yes to?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?