Complete: AZ, BY, CX, DW, ?
- A.FV
- B.EU
- C.EW
- D.EV ✓
Explanation: First letters go A,B,C,D,E (forward); second letters go Z,Y,X,W,V (backward). Next is EV.
Class 6 IMO Mathematics Olympiad practice · Patterns & Sequences · Number & Letter Sequences
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