How long does it take you to calculate the pythagorean theorem answer (to one decimal place) for any random set of two digits as your adjacent and opposite, all in your head. No paper, no calculator etc.
I was doing some in my head and wondered how long it took me. Did a stopwatch to check. It seems that for me it is between 1:15-2:30 (the square root takes the longest time so it depends on how complicated it is), idk if that is good or bad though. Wondering what it is for others now. So how long does it take you?
Also, any tips and tricks for doing mental math faster? My Physics E&M class Exams have a short time limit, so I wanna be able to do this type of basic stuff like square roots and shit faster just in my head just like addition or subtraction, but I seem to get stuck on decimals, fractions etc. Regular integer multiplication, addition etc. I can do really quick, almost intuitively, but anything involving non-integers fricks me over and ends up taking too much time. What do?