If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Can you solve the maths in the below-given picture equation?

What has 88 keys?

What English word has three consecutive double letters?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

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

What can you hold in your right hand, but never in your left hand?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?