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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.

AX390, ZU350, YR310, XO270, ?

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

WL230

Each term has three parts, a first letter, a second letter and a number, and each part follows its own steady rule.

First letters A, Z, Y, X step backward by one letter each time, so after X comes W.

Second letters X, U, R, O each drop by three places (X→U→R→O), so the next is O minus 3, which is L.

The numbers \(390, 350, 310, 270\) fall by 40 at every step.

So the next number is \(270 - 40 = 230\).

Putting the three parts together gives first letter W, second letter L and number 230.

The idea is to split a mixed alphanumeric series into independent sequences and continue each one separately.

Hence the term that completes the series is WL230.

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Important Questions from Mixed Series

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