The list of $7,000,000 Problems
If you can solve any of these problems, you will make a lot of money.
I am of the opinion that if you are motivated by money rather than
having fun solving the problem, you will never solve it. Anyway, even
if you do not solve it, feel free to work on the problems as it makes
you smarter.
How to solve them? If you have an interest in math, read as
much as you can about math and algebra, solve hard to solve problems,
try to meet other mathematically inclined persons, and do not be afraid
to be embarrassed by telling others about your ideas.