47, 121, 169, 225, 289, 361

Options

A. 225
B. 121
C. 49
D. 361

Explanation

To solve the series: 47, 121, 169, 225, 289, 361, we need to identify the pattern in the numbers.

### Step-by-Step Solution:

1. **Identify the Numbers**: The series given is 47, 121, 169, 225, 289, 361.

2. **Check for Perfect Squares**:
- 121 = 11²
- 169 = 13²
- 225 = 15²
- 289 = 17²
- 361 = 19²

3. **Identify the Odd One Out**:
- The only number that is not a perfect square in the series is 47. The other numbers are all perfect squares of odd numbers (11, 13, 15, 17, 19).

4. **Find the Nearest Perfect Square**:
- The nearest perfect square to 47 is 49, which is 7².

5. **Replace 47 with 49**:
- Therefore, we can replace 47 with 49 to maintain the pattern of perfect squares.

6. **Conclusion**:
- The corrected series should be 49, 121, 169, 225, 289, 361.

### Final Answer:
The odd number in the series is 47, and it should be replaced with 49 (7²).