Math you should have learned in 8th grade but definitely forgot. Solve geometry, percentages, and conversions instantly. We calculate fast, then add light humor about the fact that you needed a calculator to figure out 10% of 50.
Yes. It's math. Unless you entered the wrong numbers, in which case, that's on you.
Sure, but cheating won't help you when you're calculating your crushing debt later in life.
We focus on practical math. If you need calculus, you're probably smart enough to not be here.