I must have heard this sentence from a thousand different people.
I cannot dispute that it may be true: people do have different strengths
and weaknesses, different interests and priorities, different opportunities
and obstacles. But, all the same, an understanding of mathematics is not
something anyone is born with, not even Pythagoras himself. Like all
other skills, from portraiture to computer programming, from knitting to
playing cricket, mathematics can only be developed through practice,
that is to say through actually doing it.