1.

If the difference between the squares of two consecutive numbers is 47, what is the smaller number ?

Answer»

23



Let the NUMBERS be (X + 1) and x.
Therefore, (x + 1)² - x² = 47
x² + 2X + 1 - x² = 47
2x + 1 = 47
Therefore, x = 46/2 = 23



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