Find the wrong number in the following number series.
267,343,610,953,1563,2515,4079

Options

A. A)4079
B. B)953
C. C)343
D. D)2515

Answer

To find the wrong number in the series: 267, 343, 610, 953, 1563, 2515, 4079, we will analyze the pattern in the series step by step.

### Step 1: Identify the Pattern
Let's write down the series:
- 1st term: 267
- 2nd term: 343
- 3rd term: 610
- 4th term: 953
- 5th term: 1563
- 6th term: 2515
- 7th term: 4079

### Step 2: Check the Sum of Consecutive Terms
We will check if each term (from the 3rd term onward) is the sum of the two preceding terms.

1. **Check 3rd term (610)**:
- 1st term + 2nd term = 267 + 343 = 610 (Correct)

2. **Check 4th term (953)**:
- 2nd term + 3rd term = 343 + 610 = 953 (Correct)

3. **Check 5th term (1563)**:
- 3rd term + 4th term = 610 + 953 = 1563 (Correct)

4. **Check 6th term (2515)**:
- 4th term + 5th term = 953 + 1563 = 2516 (Expected value)

### Step 3: Identify the Wrong Term
From the calculations, we see that the expected 6th term should be 2516, but the series has 2515 listed as the 6th term. Therefore, the 6th term is incorrect.

### Step 4: Verify the 7th Term
To ensure the series is consistent, we can check the 7th term:
- 5th term + 6th term = 1563 + 2516 = 4079 (Correct)

### Conclusion
The wrong number in the series is **2515**. The correct number should be **2516**.