There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

How many times in a given day, minutes and hour clock comes in a straight line ?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Which alphabet letter is a question?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What has no start, end, or centre?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

Spot what is wrong here in below Picture?