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Find the missing term in the series: D, F, I, M, ?
P
Q
R
S
R
Convert letters to their numerical positions in the alphabet to identify the increasing gap (+2, +3, +4, +5) between consecutive terms.
Convert letters to their numerical positions in the alphabet to identify the increasing gap (+2, +3, +4, +5) between consecutive terms.
Numerical Mapping
Convert letters to positions: D=4, F=6, I=9, M=13. We need to find the 5th term.
Analyze the Gap Pattern
The differences between consecutive terms are: F-D = 6-4 = +2; I-F = 9-6 = +3; M-I = 13-9 = +4. The pattern is +2, +3, +4, so the next increment must be +5.
Calculate the Missing Term
Apply the next increment: 13 (M) + 5 = 18. The 18th letter of the alphabet is R.
A: P corresponds to 16, which is incorrect as the required gap is 18; B: Q corresponds to 17, which does not follow the +5 increment logic; D: S corresponds to 19, which is one step beyond the calculated value of 18.
C is correct because the series follows a pattern of increasing gaps (+2, +3, +4, +5), where 13 (M) + 5 = 18 (R).
For letter series questions, always write the numerical rank of letters immediately below them to reveal hidden arithmetic patterns faster.
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