Just a little project I made that helps with your brain, you just see how fast you can solve it. So the questions are in 1 digits for now, I may add 2 digits and 3 digits in the future but it's kinda hard right now. The questions are in addition if you were wondering.
I prefer 20 questions and 0.5 seconds. The code is kinda loosely made as I made this in like 10 minutes.