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Number Detective

Follow the clues to find the mystery number.

Six Is the Sum

What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?


In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. Can you reconstruct the original multiplication?

The Thousands Game

Age 7 to 11
Challenge Level

What kind of number will the units digit need to be to make an even number? What about an odd number?
To make the highest possible number, where would it be best to put the highest digit card?
If you want to make the lowest number, where would it be best to put the lowest digit card?
Don't forget to tell us your reasons for each child being the winner.