Find the missing number: 210, 195, 175, 150, 120, ?

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A 90
B 75
C 80
D 85

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Answer: D. 85

The differences are 15, 20, 25, 30, so each difference increases by 5. The next difference is 35: 120 - 35 = 85.

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Find the missing number: 210, 195, 175, 150, 120, ?

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