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?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

How many letters are in the alphabet?

What is the longest word in the dictionary?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

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

(it's a funny riddle)

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