Find the next term in the following alphanumeric series:
C12W, D20O, G30I, L42E, ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → S56C
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 C (3), D (4), G (7), L (12):
The gaps are 1, 3, 5 (odd numbers)
So the next gap is 7: \(12+7=19\), that is, S
Numbers 12, 20, 30, 42:
They are \(3\times4,\ 4\times5,\ 5\times6,\ 6\times7\)
So the next is \(7\times8=\) 56
Last letters W (23), O (15), I (9), E (5):
They fall by 8, 6, 4
So the next falls by 2: \(5-2=3\), that is, C