Can you find the thief by just looking at the picture below?

Can you find out the remainder when 3^300 is divided by 5?

If eleven plus two equals one, what does nine plus five equal?

I have Rs.50 and I spend it in the way as below.

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

What word is represented by this rebus?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

Until it is measured, not known. Yet how you miss it when it has gone. What is it?