I am thinking of a two digit number, AB, such that A x B=AB/2, and A+B=AB/4. What is the number AB?
"Pure mathematics is, in its way, the poetry of logical ideas."
Welcome to the forum.
In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.