To solve the problem, let's analyze the given series: 3F, 6G, 11L, 18L, ?. We have two main components in each term of the series: a number and a letter. We'll examine both components separately.
Number Series:
1. Look at the sequence of numbers: 3, 6, 11, 18.
2. Identify the difference between each consecutive number:
- 6 - 3 = 3
- 11 - 6 = 5
- 18 - 11 = 7
3. The differences 3, 5, and 7 form an arithmetic sequence with a common difference of 2.
4. The next difference should be 9 (7 + 2).
5. Add this difference to the last number in the series: 18 + 9 = 27.
Letter Series:
1. Look at the sequence of letters: F, G, L, L.
2. Convert each letter to their respective positions in the English alphabet:
3. Observe the pattern: First two letters increase by 1 (F to G), then it jumps to L but remains constant at 12.
4. Following this pattern, it seems we need a change after repeating.
5. So, we predict the next letter would be P at position 16 (12 + 4).
Therefore, the next term in the series is 27P.
The correct answer is 27 P.