I have three post high school diplomas on my wall. LOL. One is for Commercial Refrigeration another for Industrial Electricity, the last one was for truck driving. I worked on and was operator for 150-350 ton air conditioning plants as many as ten at one time, have been a boiler operator, fire fighter, Ammo hauler, grave digger, and commercial over the road truck driver.
The only job I was Math tested on was a temporary job I took as a night clerk. The company did not allow clerks to give change back by what the cash register said. We had to total it, take the money, and count back to them their change to the amount given us. It kept them from ripping you off and the same for you to them.
Here is a rather humorous thing that happened to me in Voc/Tech school after the Navy. They decided we all needed a Math class. The math instructor decided to make it Geometry. I had trouble with it. He looked at me very seriously and said if you go on a job and have to set a ladder to climb up on a roof how are you going to make certain it's at the proper angle? I said well I place my feet at the foot of the ladder where it touches the ground. I then extend my arms straight out and if I can grasp the ladder in that position and the ground is stable it is safe to climb and at the proper angle. He could not grasp that concept. I said if I get a calculator out to place a ladder Ill be fired because my boss is losing money while I should already be up on the roof LOL.
I was also in the Army NG for a year. We had a map reading class involving Grid Coordinates for locating positions to the target from the Battery. They were easy for me. The other guys couldn't catch on. Top asked me if I wanted to be a Forward Observer {I asked a buddy what that was} and I said no thanks I'll haul the ammo instead LOL.
That’s funny stuff. Some of the stupidest, no common sense people I ever worked with were interns in a world renowned teaching hospital. I literally had nightmares for years in which I was saying, “you touch that baby over my dead body.” And that’s not an exaggeration. I have to be on death’s doorstep to see a doctor and have documented “White Coat Syndrome.” It’s kind of like the top of my nursing class peer that tried to ambulate a double amputee. Book smart, real world stupid.