That's all Greek to me.You've undoubtedly SEEN it. Binary is the simplest way that all computers speak - in simplest terms, a gate or circuit is a "1" if it is on, and a "0" if it is off. Base a number system on THAT, and you have a machine that can math (instead of using decimal, because we all have ten FINGERS).
You've probably never seen octal unless you're like OLD. Octal was used all the time in older computers.
Hex is the easiest way to represent binary and anytime you've opened a file and saw a bunch of gobbledy-gook, you were probably looking at hexadecimal. Think of it as binary in groups of four.
But back to the point - no algebra? Geometry? (I actually didn't have statistics until college, but it involved some pretty serious math - which I now use at my job). Without that - what IS high school math? You know arithmetic by the fifth grade.

I was kicked out of pre-algebra back into general math. I've even had a couple of tutors try and help me, but I cannot grasp the concept. I am definitely not a STEM candidate.