Find the next number in the series below

21 32 54 87 131 ?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

During which month do people sleep the least?

Solve the rebus riddle in the picture below.

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

What kind of band never plays music?

what does this picture(rebus) riddle means ?

I look at you, you look at me, I raise my right, you raise your left. What am I?