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Select the number that can replace the question mark (?) in the following series. 1, 1, 2, 3, 7, 22, ?

A152

B156

C157

D155

Answer:

D. 155

Read Explanation:

1 × 1 + 1 = 2 2 × 3 + 1 = 7 3 × 7 + 1 = 22 7 × 22 + 1 = 155


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