Sentence examples for numbers game from inspiring English sources

"numbers game" is grammatically correct and is usable in written English.
You can use it to refer to a situation or competition that involves counting numbers or involves some form of mathematical skill, such as a game in which players have to try to reach a certain numerical target before their opponents. For example, you could say "I'm trying to beat my brother at the numbers game - he's always been better than me at math".