maths magic tricks


Maths Trick 3

Try this one in your head, using mental maths...

Step 1
Ask a friend to think of a number between 1 and 10.
Example: 8

Step 2
Get them to double it.
Example: 16

Step 3
Ask them to add 10 to the answer.
Example: 26

Step 4
Then get them to divide by 2.
Example: 13

Step 5
Ask them to tell you what number they now have.
Example: 13

Step 6
You subtract 5 from this and tell them what their original number was.
Example: 13 - 5 = 8

Note: If you wish to take turns to practice your mental maths, you can also use 2 and 3 digit numbers to make it harder!

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