This is a concise description of what happens if I attempt any problem solving task with numbers:  I never work out where to start.  If by some miracle [and I'm talking Moses parting the waves here] I work out where to start, then there will be some point where I won't work out which area of maths to use.
I have found no answer to  or . I did maths at university and in one unit I passed with 55%; I got 90% for the bookwork and almost nothing for the problem solving. In one problem solving task I actually got zero; I never worked out where to start. That was following bad marks at high school maths because of the problem solving component.
I can problem solve with things that are not numbers. I run Linux and have nobody else to help me out. I sort out problems with scanners, printers, bootloaders and many other aspects. I also get scores off the charts for the blocks component of the IQ test. I have always been reluctant to get any help with maths problem solving. Then I got the response from my family "it's OK if you're thick". Then I would scream back "I am not thick". That's one megaton H bomb - maths is so bound up in "being thick" if you can't do it.