Did you know?
A googol is 1 followed by 100 zeros! A nine-year-old boy named Milton thought up this funny name in 1920.
In ancient Egypt, a picture of a tadpole meant 1,00,000 (one lakh). A lotus flower meant 1,000!
Many clocks with Roman numerals show four o'clock as IIII, not IV. Look out for one!
Try this: Guess My Number
Read the clues and find my number. I am between 10 and 20. I am an even number. My two digits add up to 5. Who am I? Now make up your own 'Guess My Number' riddle. Give your family three clues!
Show answer
14
Go further: Count Like a Roman
The Romans wrote numbers using letters. I means 1, V means 5 and X means 10. Put letters side by side to add them. So VI is 5 + 1 = 6, and XI is 11. If a smaller letter comes before a bigger one, take it away. So IV is 4 and IX is 9. The Romans had no sign for zero! Can you write your age in Roman numerals?