Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

People make me, save me, change me, raise me. What am I?

Why is the longest human nose just 11 inches?

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?

One day Jenifer meets the Lion and the Tiger in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Tiger, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Jenifer:

Lion: Yesterday was one of my lying days.

Tiger: Yesterday was one of my lying days too.

What day is it?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Can you find out the missing number in the grid?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?