Replace the question mark with the correct number in below Picture:

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

What is the relationship between these matchstick pictures below?

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?

How many triangles can you find in this given picture?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Find out the missing number in the picture attached: