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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? GKF JNI MQL PTO?
SWR
WRS
WSR
SRW
SWR
Look at the pattern in each letter position independently: The first letter adds 3, the second letter adds 3, and the third letter adds 3 to the previous term.
Look at the pattern in each letter position independently: The first letter adds 3, the second letter adds 3, and the third letter adds 3 to the previous term.
Analyze the first letters
G (7), J (10), M (13), P (16). The pattern is +3. So, 16 + 3 = 19, which is S.
Analyze the second letters
K (11), N (14), Q (17), T (20). The pattern is +3. So, 20 + 3 = 23, which is W.
Analyze the third letters
F (6), I (9), L (12), O (15). The pattern is +3. So, 15 + 3 = 18, which is R.
B: WRS ends in S, which is incorrect as the third letter must be R. C: WSR is a permutation of the correct letters in the wrong order. D: SRW is a permutation of the correct letters in the wrong order.
A is correct because the series follows a consistent +3 shift for each of the three letter positions, resulting in S, W, and R respectively.
For letter series, always write down the positional numbers (A=1, B=2...) above each letter to reveal the underlying arithmetic pattern instantly.
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