What month of the year has 28 days?

I am the fastest animal but cannot climb the tree. What am I?

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?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

What you cannot hold but it is yours?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?