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Question

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

PW146, OV126, NU106, MT86, ?

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

LS66

Each term of this series has two letters followed by a number, so we treat the three components separately and find a rule for each.

Look at the first letters: P, O, N, M. Each one steps back by one place in the alphabet, so the next first letter is L.

Look at the second letters: W, V, U, T. These also step back by one place each time, so the next second letter is S.

Now the numbers: 146, 126, 106, 86. Each drops by 20 (\(146 - 20 = 126\), and so on), so the next number is \(86 - 20 = 66\).

Combining the three results gives first letter L, second letter S, and number 66.

So the missing term is LS66, which matches the given option exactly.

Hence the term that completes the series is LS66.

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