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Answer to Q47

If 5, 3 = 28 and 7, 6 = 113 and 4, 5 = -19. What is 3, 8?

The relationship between the numbers is

x, y = (x - y)(x + y)

5, 3 = (5 - 3)(5 + 3) = (2)(8) written as 28
7, 6 = (7 - 6)(7 + 6) = (1)(13) written as 113
4, 5 = (4 - 5)(4 + 5) = (-1)(9) written as -19
so, 3, 8 = (3 - 8)(3 + 8) = (-5)(11)

Answer: -511

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429 viewsAug 24, 2019 at 09:24

Answer to Q47

If 5, 3 = 28 and 7, 6 = 113 and 4, 5 = -19. What is 3, 8?

The relationship between the numbers is

x, y = (x - y)(x + y)

5, 3 = (5 - 3)(5 + 3) = (2)(8) written as 28
7, 6 = (7 - 6)(7 + 6) = (1)(13) written as 113
4, 5 = (4 - 5)(4 + 5) = (-1)(9) written as -19
so, 3, 8 = (3 - 8)(3 + 8) = (-5)(11)

Answer: -511

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