Mystery Numbers

In Maths today we have been challenging each other with mystery numbers. We came up with a number of clues to a number. You have to think carefully about the properties of different numbers. It was quite a challenge!

Have a look at these 3 Mystery Numbers. Can you work out what they are?

1. I am thinking of a number, it is...
   Less than 40
   It is an odd number
   It is a multiple of 5 and 7
   Add the digits together and you get 8
   
   
2. I am thinking of a number, it is...
   More than 65
   It is an even number
   Add the digits together and you get 17
   
   
3. I am thinking of a number it is...
   An even number
   A multiple of 6 and 4
   It is a square number

To write your own mystery number clues pick a number under 100 and think about these things for your clues.

• Odd or Even?
• What is it a multiple of?
• Is it a square number?
• Can you name some of the factors?
• More or less than a number.

Still Want More?

Play Mystery Math against the computer, challenge yourself in this place value clues game or why not try and work out what is wrong with these Alien Calculators.

In The Comments

• Try and answer what the 3 Mystery Numbers are.
• Write your own mystery number clues, see the ideas above to help.
• What do you think of the games?