Mr Madge shares a maths tricks.

Mr Madge shares a maths tricks. No, it’s not that he changed his hair colour from silver to red!

What’s one of the best ways to engage an audience and have them believe that mathematics is really cool? Show them all an unbelievable trick, that they won’t believe. Then show them how to do it. Have them practise it and share their new found magical skills on others. What a great motivation to be working with numbers and impress an audience using maths.

Magic Maths Trick – 15 is the answer

Steps

  1. Think of a number
  2. Multiply that number by 3
  3. Add 45
  4. Multiply by 2
  5. Divide by 6
  6. Your answer minus the number you thought of

Your answer will be 15.

Worked example:

Steps Working out
 Think of a number  3
 Multiply that number by 3  3*3=9
 Add 45  9+45=54
 Multiply by 2  54*2=108
 Divide by 6  108/6=18
 Your answer minus the number you thought of  18-3=15
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