Check out my intro for this project :) Answer the questions, higher difficulty = higher numbers.
I know this doesn't have all the features yet (only HCF works, and sometimes it will say 2 numbers where the HCF is unintentionally higher - like if it's 120 and 180 and you say 60 it says you are wrong) Also I got the bus sound from a Scratch project called NWFB Crash Animation (or something like that.) not sure where the creator of that got the sound from. This is a School project