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Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? QTW 13, MPS 19, ILO 25, EHK 31, ADG 37, ?
WZC 47
ZZC 43
WGC 43
WZC 43
WZC 43
Analyze the three character slots and the number separately: The 1st letters move back by 4, the 2nd by 4, the 3rd by 4. The numbers increase by a constant increment of 6.
Analyze the three character slots and the number separately: The 1st letters move back by 4, the 2nd by 4, the 3rd by 4. The numbers increase by a constant increment of 6.
Analyze the letters
Each triplet follows a -4 pattern for all three positions. Q-4=M, T-4=P, W-4=S. Continuing this: A-4=W (wrap around), D-4=Z, G-4=C.
Analyze the numbers
The numbers follow an arithmetic progression: 13, 19, 25, 31, 37. The common difference is +6. Therefore, 37+6 = 43.
Combine result
Merging the resulting letters (W, Z, C) and the calculated number (43) gives the final cluster: WZC 43.
A: Wrong number 47; B: Incorrect letter Z at the start; C: Incorrect middle letter G instead of Z.
D is correct because the letter sequence consistently decreases by 4 positions in the alphabet, and the numerical value increases by a constant difference of 6.
In alphanumeric series, always check letters and numbers independently first; often the letters follow a cycle while numbers follow a simple addition or prime number pattern.
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