Find the next number in the sequence

1, 2, 6, 21, 88, __?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

In the given picture, in how many ways can you read the word "Tiger"?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What has hands, but can’t clap?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

I have feet, but no legs. Which animal Am I?