There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

It belongs to you, but other people use it more than you do. What is it?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

They are three errirs in this question. Can you find them?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

The Little ant seems to be always confused. Do you know why?