4, 7, 25, 10, __, 20, 16, 19. What number should fill the blank?

Rakesh Kumar • 28.44K Points
Instructor II Reasoning

Q. 4, 7, 25, 10, __, 20, 16, 19. What number should fill the blank?

(A) 13
(B) 15
(C) 20
(D) 28

Correct Answer - Option(A)

Explanation by: Rakesh Kumar

Two series alternate here, with every third number following a different pattern. In the main series, 3 is added to each number to arrive at the next. In the alternating series, 5 is subtracted from each number to arrive at the next.

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