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62How to find the sum of an integer and its reciprocal
Suppose the sum of an integer and its reciprocal is 65/8. What is the integer? Integer is a, reciprocal is 1/a. a + 1/a = (a^2+1)/a a^2+1 = 65 a = 8 The method is to start by naming the thing you don't know, which is the integer. I...
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61How to Easily do Subtraction in your Head
Children are given calculators at such a young age they have lost the art of mental arithmetic. The brain is capable of so much more than we ask it, especially in the area of mathematics and mental...
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