Q.

What number should come next in the series? 1, 1, 2, 3, 5, 8, 13

A. 15
B. 17
C. 18
D. 21
Answer» D. 21
Explanation: This is a classic example of a Fibonacci series, where each number is the sum of the two preceding ones. So the next number should be 8 (the last number in the series) + 13 (the second last number in the series) = 21.
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