A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What jumps when it walks and sits when it stands?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Count the number of triangles in the picture below: