Find the next letter in the following series.
C,D,F,I , ?

Options

A. M
B. G
C. N
D. P

Answer

To find the next letter in the series C, D, F, I, we need to analyze the pattern in the sequence.

1. **Identify the position of each letter in the alphabet:**
- C is the 3rd letter.
- D is the 4th letter.
- F is the 6th letter.
- I is the 9th letter.

2. **Determine the differences between the positions:**
- From C (3) to D (4): the difference is 1 (4 - 3 = 1).
- From D (4) to F (6): the difference is 2 (6 - 4 = 2).
- From F (6) to I (9): the difference is 3 (9 - 6 = 3).

3. **Observe the pattern in the differences:**
- The differences between the positions are increasing by 1 each time: 1, 2, 3.

4. **Predict the next difference:**
- Following the pattern, the next difference should be 4.

5. **Calculate the position of the next letter:**
- The position of I is 9. Adding the next difference (4) gives us: 9 + 4 = 13.

6. **Identify the letter corresponding to the 13th position:**
- The 13th letter of the alphabet is M.

Thus, the next letter in the series is **M**.