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Mathematics - Easily Square Any Number Between 11 and 99
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Easily Square Any Number Between 11 and 99

Mathematics

Find the nearest multiple of 10 and find out how much you have to + or – (k) to get to that number. Then do the opposite function (+ or -) to get two numbers that average out to n (i.e. n + k and n – k). Multiply the two numbers and add square of k.

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