I like having an odd number of people at tables.

我喜欢进餐的人数是奇数

It's eternally an odd number.

它永远是个奇数。

Seven is an odd number.

七是奇数。

Is it an even number or an odd number?

那它是偶数还是奇数。

This rack has an odd number of hats.

这个衣帽架上有奇数的帽子。

Three is an odd number.

三是个奇数。