Choose the missing term out of the given alternatives:
B2D, C3F, E4I, H5M, ?, Q7X
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → L6R
In a letter-number series, each part of the term follows its own rule, so the first letters, the numbers and the last letters are checked separately.
First letters B (2), C (3), E (5), H (8): the gaps are 1, 2, 3, so the next gaps are 4 and 5: \(8+4=12\) (L), and \(12+5=17\) (Q), as in Q7X
Numbers 2, 3, 4, 5: they go up by 1, so the next is 6, and then 7, as in Q7X
Last letters D (4), F (6), I (9), M (13): the gaps are 2, 3, 4, so the next is \(13+5=18\) (R), and then \(18+6=24\) (X), as in Q7X
So the missing term is L6R.