Hello,
I'm not quite sure if you would like to add math games or not, but here's a one I found here and there.
Krypto is a game where the goal is to use arithmetic operations to match the objetive card's number. The deck used is something different than the french deck we already know although it shouldn't be a problem.
More info below:
https://en.wikipedia.org/wiki/Krypto_(game)
Thanks!

Nothing wrong with maths games. At school a teacher created bingo with a twist. He would read out something like 7 5's you had to work out that it was 35 and then check if you had 35 very quickly before he read out another. It certainly made us learn our times tables! I think RS wouldn't add that option to their bingo!