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Question

What should come next in the following series?

A4, C16, F36, J64, ?

This question was previously asked in
SSC CHSL 2025 Tier 1 Question Paper (21-Nov-2025) (Shift 1)
The correct answer is

O100

Each term has a letter part and a number part; analyse the two patterns separately.

Letters: A, C, F, J, ? Their positions are 1, 3, 6, 10, and the gaps increase as +2, +3, +4, so the next gap is +5 giving position \(10 + 5 = 15\), which is O.

Numbers: 4, 16, 36, 64, ? These are squares of even numbers: \(2^2 = 4\), \(4^2 = 16\), \(6^2 = 36\), \(8^2 = 64\).

The next even number is 10, so the next value is \(10^2 = 100\).

Combining the letter O with the number 100 gives the next term.

Options N100, K100 and L100 have the wrong letter for position 15.

Hence the next term is O100.

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Similar Questions

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Important Questions from Mixed Series

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