If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Which is faster, Heat or Cold ? Explain.

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

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

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

No one wants to have it, but if one got it, he does not want to lose it. What is It?

What always comes into a house through the keyhole?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?