What should come next in the following series?
A1, C1, E2, G3, I5, ?
Show answer & explanation
Correct answer: A
Explanation
Given Series: A1, C1, E2, G3, I5, ?
Analyze the letter pattern:
The letters are: A, C, E, G, I, ?
Positions in the alphabet: A (1), C (3), E (5), G (7), I (9)
Each letter increases by 2 positions in the alphabet.
So, after I (9), the next letter will be: 9 + 2 = 11 → K
Analyze the number pattern:
The numbers are: 1, 1, 2, 3, 5, ?
This is the Fibonacci sequence [Each number is the sum of the two previous ones.]: 1, 1, 2, 3, 5, 8
So, the next number is 8.
Therefore, Next term = K8
Hence, the correct answer is option (1).