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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? QSU, PRT, OQS, NPR,?
MQO
MOQ
OMQ
OQM
MOQ
Look at the pattern of letters: each triplet is formed by taking three consecutive odd/even positions or a consistent step jump. Here, each letter in the triplet shifts -1 in the alphabet (e.g., Q-1=P, S-1=R, U-1=T).
Look at the pattern of letters: each triplet is formed by taking three consecutive odd/even positions or a consistent step jump. Here, each letter in the triplet shifts -1 in the alphabet (e.g., Q-1=P, S-1=R, U-1=T).
Analyze the series
The given series is QSU, PRT, OQS, NPR. Let's look at the movement of each character across the triplets: Q тЖТ P тЖТ O тЖТ N (-1 shift per letter). Similarly, S тЖТ R тЖТ Q тЖТ P (-1 shift per letter) and U тЖТ T тЖТ S тЖТ R (-1 shift per letter).
Determine the next term
To find the term after NPR, apply the -1 shift to each letter of NPR: N-1 = M, P-1 = O, R-1 = Q. The resulting triplet is MOQ.
A: MQO is incorrect because the O and Q are swapped. C: OMQ is incorrect as it starts with O instead of M. D: OQM is incorrect because it uses the wrong sequence of letters.
B is correct because the series follows a pattern where every character is shifted back by 1 position in the alphabet (N-1=M, P-1=O, R-1=Q).
Always verify the transformation of the first and last letters of a triplet first; often that is enough to eliminate 2-3 wrong options immediately!
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