Drop the Zero : A Mathemtical Magic Trick | Math2Ever |
Drop the Zero : A Mathemtical Magic Trick Posted: 24 Jul 2014 05:44 PM PDT Impress your friends and give them a little practice with their math times tables with this mathematical magic trick. Tell your friend to pick their favourite number between 1 and 100, but don't tell you what it is! Note: If your friends are children, have them pick a number between 1 and 9 so they are able to do the next steps. If you're doing this with mum and dad, you can tease them and make them pick REALLY big numbers so they have to work hard at the math. They'll be very surprised when you come back with the answer so quickly! Have them multiply their number by 2. Have them multiply their number by 5. Have them tell you the answer they've come up with. Drop the zero from the answer they gave you and tell them what their number was! Example 1: Favorite number = 5 5 x 2 = 10 10 x 5 = 50 50 --- drop the zero = 5! Example 2: Favorite number = 32 32 x 2 = 64 64 x 5 = 320 320 --- drop the zero = 32! How it works: |
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