Find the missing term in the following series: 10, 11, 13, 17, 25, 31, 33, ?
Question and options
Find the missing term in the following series: 10, 11, 13, 17, 25, 31, 33, ?
- 34
- 45
- 39
- 37
Answer and explanation
Correct answer: D - 37
Differences are 1, 2, 4, 8, 6, 2, ... i.e. the last digits of powers of 2 (1, 2, 4, 8, 16, 32, 64...). The next difference is 4, so 33 + 4 = 37.
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