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What should replace the question mark: 8, 15, 29, 57, 113, ?

Competition practiceNumber Series

A225
B226
C169
D224

Step-by-Step Solution

Each term is doubled and 1 is subtracted:

8 \times 2 - 1 = 15, 15 \times 2 - 1 = 29, ..., 113 \times 2 - 1 = 225

.

Answer: A) 225

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