How can a man go eight days without sleep?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

There are forty elephants and they have forty-fore heads. How can this be possible?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

In the picture given below, can you find out which digit will take place of the question mark?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

What kind of band never plays music?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?