How do you go from 98 to 720 using just one letter?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

What has to be broken before you can use it?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Can you tell a 3D object that has just two surfaces?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111