What is the below Rebus indicate?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

If you say my name, I will no longer exist. What am I?

What has many keys but can’t open a single lock?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

What has no start, end, or centre?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?