Why do people go to bed?
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?
How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
What do you see in the image below
I taste better than I can smell. Who am I?
What number do you get when you multiply all of the numbers on a telephone's number pad?
Find three whole, positive numbers that have the same answer when multiplied together as when added together.
Why is the Hole below a Lock?
Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?
Find out the missing number in the picture attached:
What is the fastest way to double your money?
The phrase “thinking outside the box” was popularised from the solution to a topographical puzzle involving 9 dots in a box shape.
