Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

What happened when the wheel was invented?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

There was a strange boy who was born before his father. How can this be possible?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

What has to be broken before you can use it?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

Can you count the number of triangles in the picture below?