In each of the following number series , a wrong number is given ,find out the wrong number -----
2 4 5 8 13 21 34

Options

A. 4
B. 5
C. 8
D. 13

Answer

To find the wrong number in the series 2, 4, 5, 8, 13, 21, 34, we can analyze the pattern of the series step by step.

### Step-by-Step Solution:

1. **Identify the Series**:
The given series is: 2, 4, 5, 8, 13, 21, 34.

2. **Look for Patterns**:
We can observe the pattern by checking if each number can be derived from the previous numbers.

3. **Check the First Few Terms**:
- Start with the first two numbers:
- 2 + 2 = 4 (This is correct)
- Now check the next number:
- 4 + 1 = 5 (This is also correct)
- Next:
- 4 + 5 = 9 (This does not match the next number, which is 8)

4. **Continue Checking**:
- The next number should be:
- 5 + 3 = 8 (This is correct)
- Now check:
- 5 + 8 = 13 (This is correct)
- Next:
- 8 + 5 = 13 (This is incorrect, as we already have 13)
- Continue:
- 13 + 8 = 21 (This is correct)
- 21 + 13 = 34 (This is correct)

5. **Identify the Wrong Number**:
From the analysis, we see that the number 4 is out of place. The correct sequence should have been:
- 2, 3, 5, 8, 13, 21, 34.

6. **Conclusion**:
The wrong number in the series is **4**.