Replace the question mark with the correct number.

What does a man do only once in his lifetime, but women do once a year after they are 29?

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?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Count the number of squares in the picture below.

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

Find the next number in the series below

21 32 54 87 131 ?

What does this Rebus Picture means ?

I am quite hot but become too cold if you remove the first two letters. What am I?