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25-06-2017
Mathematics

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What number is needed to complete the pattern below?

66 73 13 21 52 __ 10 20

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texaschic101 texaschic101

25-06-2017

73 - 66 = 7
21 - 13 = 8
x - 52 = 9....x = 61
20 - 10 = 10

answer is 61

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