A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Find the next number in the series below

21 32 54 87 131 ?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What makes this number unique: 8,549,176,320?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?