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

Can you find the key in the picture below?

What can go through glass without breaking it?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

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

Can you find out which number multiplied by itself will give the output as 12345678987654321?

An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

Why is it very easy to weigh a fish?

There are 3 apples in the basket and you take away 2. How many apples do you have now?