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Question

Which of the following options will replace the question mark (?) in the given series?

Z1, X2, V3, T4, ?

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

R5

Each term of the series has a letter part and a number part; analyse them separately.

Letters: Z, X, V, T, ? Moving backward, each letter skips one position: Z → X (2 back), X → V (2 back), V → T (2 back), so T → R (2 back).

Numbers: 1, 2, 3, 4, ? These increase by 1 each time, so the next number is 5.

Combining the letter R with the number 5 gives the missing term.

Therefore the term replacing the question mark is R5.

Options S5, P6 and Q5 do not match both rules simultaneously (wrong letter or wrong number).

Hence the answer is R5.

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