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
- Think of a number
- Multiply that number by 3
- Add 45
- Multiply by 2
- Divide by 6
- Your answer minus the number you thought of
Your answer will be 15.
|Think of a number||3|
|Multiply that number by 3||3*3=9|
|Multiply by 2||54*2=108|
|Divide by 6||108/6=18|
|Your answer minus the number you thought of||18-3=15|