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What should come in place of the question mark (?) in the following series: BGD, CIF, EKH, GNJ, ?
IPL
IPM
IQM
IRM
IPL
Analyze each letter position independently column-wise: position 1 increases by +1, +2, +2, +2; position 2 increases by +2, +2, +3, +2; position 3 increases consistently by +2.
Analyze each letter position independently column-wise: position 1 increases by +1, +2, +2, +2; position 2 increases by +2, +2, +3, +2; position 3 increases consistently by +2.
Step 1: First Letter Analysis
The first letters are B(2), C(3), E(5), G(7). The sequence of differences is +1, +2, +2, +2, leading to I(9).
Step 2: Second Letter Analysis
The second letters are G(7), I(9), K(11), N(14). The differences are +2, +2, +3, +2, leading to P(16).
Step 3: Third Letter Analysis
The third letters are D(4), F(6), H(8), J(10). They increase by a constant +2 each time, leading to L(12).
B: IPM is incorrect because the third letter must be L. C: IQM is incorrect because the second and third letters do not fit the sequence. D: IRM is incorrect because both the second and third letters are wrong.
A is correct because the independent positional patterns yield the letters I, P, and L respectively.
Always analyze multi-letter series column-wise by splitting each term into individual positions to quickly spot hidden arithmetic patterns.
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