What is the centre of gravity?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Find the last number in the series below:

voN luJ yaM raM ---

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10