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?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

A father's child, a mother's child, yet no one's son.

Who am I?

How many sides does a circle have?

Where do you go to learn how to make ice cream?

What is the riddle which can be asked all day with a different correct answer each time.

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6