27, 63, 123, 153, 203, 273

Options

A. 273
B. 203
C. 123
D. 153

Explanation

To solve the problem, we need to analyze the given series: 27, 63, 123, 153, 203, 273, and identify which number is not fitting the pattern.

### Step-by-Step Solution:

1. **Identify the series**: The numbers in the series are 27, 63, 123, 153, 203, and 273.

2. **Check for divisibility by 3**: We will check if each number in the series is a multiple of 3. A number is a multiple of 3 if the sum of its digits is divisible by 3.

- **For 27**:
- Sum of digits = 2 + 7 = 9
- 9 is divisible by 3. So, 27 is a multiple of 3.

- **For 63**:
- Sum of digits = 6 + 3 = 9
- 9 is divisible by 3. So, 63 is a multiple of 3.

- **For 123**:
- Sum of digits = 1 + 2 + 3 = 6
- 6 is divisible by 3. So, 123 is a multiple of 3.

- **For 153**:
- Sum of digits = 1 + 5 + 3 = 9
- 9 is divisible by 3. So, 153 is a multiple of 3.

- **For 203**:
- Sum of digits = 2 + 0 + 3 = 5
- 5 is not divisible by 3. So, 203 is NOT a multiple of 3.

- **For 273**:
- Sum of digits = 2 + 7 + 3 = 12
- 12 is divisible by 3. So, 273 is a multiple of 3.

3. **Conclusion**: All numbers in the series are multiples of 3 except for 203. Therefore, 203 is the number that does not fit the pattern.

### Final Answer:
The number that is wrong in the series is **203**.