HI, Gergis Fawzy, I have been asking the same question, a game like that would be awesome, but as far as "I" know you would need many math blocks or some sort of advance logic if you wanted to make it random. This would be possible if you were willing to make the hundreds of scenes this would require to make it enjoyable and set the correct answer with a logic button so when the player clicks the correct answer it moves on and vice versa. But technically this would be possible with Buildbox, but I am no expert so i don`t want to give you bad information
This Channel does it too .. I think the answer is too easy but we just don't know how I thinks it's a next checkpoint and enemy but I just don't know how
It looks like something very nice that people would download, but i`m like you, it seems really easy to make, but yet we can`t figure out how. :\