Is This Correct ?

Introducing my new game, created in just one hour to challenge myself in making short games! 

Exercise your brain and math skills with this very simple game! 

You simply need to choose true or false based on what you think of the operation displayed on the screen, but watch out for the timer, you only have 5 seconds to submit your answer! 

I hope you will enjoy it as much as i enjoyed doing it, and improve your math skills... and don't hesitate to give me ideas to add features to it! I would love to try adding them!