# 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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