I can write cow in 13 letters.

Can You?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Who has married many women but was never married?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99