Find the next number in the sequence

5 12 24 36 ?

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you divide the below-given shape into four equal and identical pieces?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

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?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.