22,33,66,99,121,279,594

Options

A. 33
B. 121
C. 279
D. 594

Answer

To determine the odd one out in the series 22, 33, 66, 99, 121, 279, and 594, we can analyze the numbers in terms of their divisibility by 11.

### Step-by-Step Solution:

1. **Identify the Numbers**: The numbers in the series are 22, 33, 66, 99, 121, 279, and 594.

2. **Check Divisibility by 11**:
- **22**: \(22 \div 11 = 2\) (Divisible)
- **33**: \(33 \div 11 = 3\) (Divisible)
- **66**: \(66 \div 11 = 6\) (Divisible)
- **99**: \(99 \div 11 = 9\) (Divisible)
- **121**: \(121 \div 11 = 11\) (Divisible)
- **279**: \(279 \div 11 = 25.36\) (Not Divisible)
- **594**: \(594 \div 11 = 54\) (Divisible)

3. **Identify the Odd One Out**: From the above calculations, we can see that all the numbers except 279 are divisible by 11. Therefore, 279 is the odd one out in this series.

### Conclusion:
The odd one out in the series is **279**.