Question
In each of the following series, one term is missing.
Find the missing term. 5, 13, 29, 61, 125, ?Solution
Differences: 13 − 5 = 8 29 − 13 = 16 61 − 29 = 32 125 − 61 = 64 Differences: 8, 16, 32, 64 (each doubles) Next difference = 128 Missing term = 125 + 128 = 253
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