An alphanumeric series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
D2, E6, H21, M88, ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → T445
In a letter-number series, the letters and the numbers follow separate rules, so each part is checked on its own.
The letters D (4), E (5), H (8), M (13) move ahead by 1, 3, 5 places, the odd numbers in turn:
D + 1 = E, E + 3 = H, H + 5 = M
Next: M (13) + 7 = 20, which is T
The numbers are multiplied by 2, 3, 4, 5 in turn, and the same number is added:
\(2\times2+2=6\)
\(6\times3+3=21\)
\(21\times4+4=88\)
Next: \(88\times5+5=445\)