Select the number that can replace the question mark (?) in the following series.120, 99, 80, 63, 48, ?

A. 36

B. 24

C. 35

D. 33

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc cgl Save WhatsApp Report

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Best answer

Answer: C. 35

Answer: (C) 35

120 = \(11^2 - 1\), 99 = \(10^2 - 1\), 80 = \(9^2 - 1\), 63 = \(8^2 - 1\), 48 = \(7^2 - 1\).

Next: \(6^2 - 1 = 35\). (Or: the differences are 21, 19, 17, 15, so the next is 13.)

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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