CA Foundation · Quantitative Aptitude · Number Series, Coding-Decoding and Odd Man Out
Find the missing group in the series: CAB, FDE, IGH, ?,
The missing group is LJK. The first letters go C, F, I, L with a step of 3, and each group's other two letters are the two letters immediately before... in order, following the pattern of the previous groups: A,B; D,E; G,H; so J,K comes next.
- ALJKCorrect
- BKJL
- CLIK
- DMJK
Explanation
In each group the first letter moves 3 steps ahead (C, F, I, L). The other two letters are the two preceding letters in the alphabet: A,B follows C; D,E follows F; G,H follows I. For L these are J,K, so the group is LJK. Option MJK breaks the +3 pattern for the first letter.
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