Whoa. That was easier than I thought. Had over a minute left even. Getting into the right ballpark is easy by using rounded numbers and then it's just a matter of 2-3 guesses to get the 2nd digit of an answer. Like 407/11 can be reduced to 400/10 and that's 40, so the original problem is slightly under. 39? 38? 37!
I was shocked to see in the comments that people found it was easy, I'm usually good at this stuff, but only did it at the second attempt with one second left - relieved to see that apparently they had one more minute than me.
I have relatively decent basic math skills but I find this really difficult on a screen because I'm so used to doing it by hand. Are other people using a pencil and paper and then writing in the answers? I haven't done that but I bet I would get a much better score if I did!
I dont think you will get a better score, it would take twice as much time. So the few answers you might gain, are lost in the overall halving of your score.
If you'd like to go even faster, there's a 30 Second variant also!