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Which of the following options should come in place of the question mark (?) in the given series based on the English alphabetical order? EIM, HLP, KOS, NRV,?
UYQ
UQY
QUY
QYU
QUY
Look at each position across the triplets. The 1st letter increases by +3, the 2nd letter by +3, and the 3rd letter by +3.
Look at each position across the triplets. The 1st letter increases by +3, the 2nd letter by +3, and the 3rd letter by +3.
Analyze the series pattern
Each term in the series (EIM, HLP, KOS, NRV) consists of three letters. Let's map them to their alphabetical positions: E=5, I=9, M=13; H=8, L=12, P=16; K=11, O=15, S=19; N=14, R=18, V=22.
Identify the logic for each position
1st letter: 5 (+3) = 8 (+3) = 11 (+3) = 14 (+3) = 17 (Q). 2nd letter: 9 (+3) = 12 (+3) = 15 (+3) = 18 (+3) = 21 (U). 3rd letter: 13 (+3) = 16 (+3) = 19 (+3) = 22 (+3) = 25 (Y).
Determine the final term
Combining the results for the 17th, 21st, and 25th letters, we get Q, U, and Y. Thus, the missing term is QUY.
A: UYQ is incorrect as it disrupts the positional increment sequence. B: UQY is incorrect for the same reason. D: QYU reverses the second and third character sequence.
C is correct because the series follows a consistent +3 pattern for every character index, resulting in Q(17), U(21), and Y(25).
For triplet series, always decompose the sequence into three independent sub-series (1st, 2nd, and 3rd letters) to solve it quickly.
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