Which number is the odd one out: 119, 133, 143, 217?

Explanation

1. 01

   $119 = 7 \times 17$, $133 = 7 \times 19$ and $217 = 7 \times 31$: all three are multiples of 7.

2. 02

   $143 = 11 \times 13$ is not divisible by 7, so it is the odd one out.