Great. The number i'm thinking of in my head — is it odd or even?

很好，我现在脑中想着的数字——单还是双？

They will bet on the odd or even number of mourners at a funeral.

他们会赌葬礼上送葬的人数是奇数还是偶数。

The traffic ban, based on odd or even license plate numbers, will take at least two million private cars off the road.

单双号限行措施将至少使路上的私家车减少200万辆。