Prove that the below maths equation is true.

8 + 8 = 91

Rectify the following equality 101 - 102 = 1 by moving just one digit.

What can go up a chimney down, but can’t go down a chimney up?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

How can you make number one disappear by adding something to it?

Where do fish keep their money?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

I am quite hot but become too cold if you remove the first two letters. What am I?

I have branches, but no fruit, trunk or leaves. What am I?

Which point will the car reach to go out?