Identify the odd one out: S18, U20, Y25, W22
AS18
BY25
CU20
DW22
Answer & Solution
Correct answer: B. Y25
1. Check letter position vs number: S=19, U=21, Y=25, W=23, and each number is position − 1.
2. S18 (19-1), U20 (21-1), W22 (23-1) all fit, but Y25 should be 24, not 25.
3. Hence Y25 is the odd one out.
_Source: RRB Group D CEN-02/2018 PYQ, Q.44._
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