CA Foundation · Quantitative Aptitude · Number Series, Coding-Decoding and Odd Man Out
Find the next group in the series: CAT, EBU, GCV, IDW, ?
The next group is KEX. In each group the first letter advances by two (C, E, G, I, K), the middle letter by one (A, B, C, D, E), and the last letter by one (T, U, V, W, X). Combining these gives KEX.
- AJEX
- BKEXCorrect
- CKDX
- DKEW
Explanation
The first letters go C, E, G, I, so each rises by 2, giving K. The middle letters go A, B, C, D, so the next is E. The last letters go T, U, V, W, so the next is X. The group is KEX. JEX uses a step of 1 in the first letter, which is wrong.
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