How to Quickly and Easily Tell if a Number is Divisible by 11, and Other Math Tricks
You should know how to easily tell if a number is divisible by 11. (many more fun math tricks below) As an example, we’ll use the number 10604. First, add up the odd number digits in the number: 1 + 6 + 4 = 11. Next, add up the even number digits: 0 + 0= 0. Now subtract the sum […]
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