If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

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

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

When is the top of a mountain similar to a savings account?

Using Only Five 5's and any mathematical operator make sum as 37

What happened when the wheel was invented?

Five thieves looted a bank and they ran away in a car. The bank staff informed the police and they began the search of their car in their jeep. They found them on a road and chased them eventually catching them. The light that is used to fill the number plate was broken on the thieves' car. Also, the headlights of the jeep police were not working. How were the police able to catch the thieves then?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?