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What should come in place of the question mark (?) in the given series based on the English alphabetical order? RJG, NFC, JBY, FXU, ?
BSQ
ATP
ATQ
BTQ
BTQ
Calculate the difference between consecutive letters for each position: the sequence follows a constant decreasing pattern of -4, -4, -4 for each of the three positions.
Calculate the difference between consecutive letters for each position: the sequence follows a constant decreasing pattern of -4, -4, -4 for each of the three positions.
Analyze the first letter pattern
The first letters are R(18), N(14), J(10), F(6). The pattern is -4 (18-4=14, 14-4=10, 10-4=6, 6-4=2). The 2nd letter is B.
Analyze the second letter pattern
The second letters are J(10), F(6), B(2), X(24). The pattern is -4 (10-4=6, 6-4=2, 2-4= -2 which is 26-2=24/X, 24-4=20). The 20th letter is T.
Analyze the third letter pattern
The third letters are G(7), C(3), Y(25), U(21). The pattern is -4 (7-4=3, 3-4=-1 which is 26-1=25/Y, 25-4=21, 21-4=17). The 17th letter is Q.
A: BSQ is wrong because the third letter must be Q and the second must be T. B: ATP is wrong because the first letter is B and the third is Q. C: ATQ is wrong because the first letter is B.
D is correct because the series follows a consistent pattern of -4 shift for each alphabet position, resulting in B(2), T(20), and Q(17).
When solving letter series, convert letters to numbers (A=1, Z=26) immediately to identify arithmetic progressions easily.
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