Do you know your 11 times table?
Here's a great trick to play that my secondary school maths teach er taught us (as long as you are reasonable at maths).
Tell someone you can multiply 2 digit numbers by 11 faster than they can do it on a calculator.
Get a third person to call out numbers. Lets say they say 43 x 11.
Add the two numbers together and put that number in the middle:
4 + 3 = 7 -------> 4 3 7
43 x 11 = 437! Easy. So all you have to do is add the numbers and put it in the middle!
NOTE: It gets a little harder if the numbers add up to more than 9! Lets say they say 57...
5 + 7 = 12... put the two in the middle, and add 1 to the first number aswell. 627. See it? Easy.
Enjoy!!! Let me know if it worked!
LOL, I typo'd my own trick!
43 should be 473!!!! Ooops! Sorry peeps!