Play-Mastermind.com

Just wondering because im a freshman at a community college, and im getting all my reqired classes out of the way. And i wanna know how many maths i have to take because i hate math and i suck at it.

I have been smoking Marijuana daily for over a year now, and I really do enjoy it. But the only complaint I have is that my mind is not as sharp as it used to be, my short term memory can be horrible at times. Anyone know sites, games, activities, or anything that I can do daily or randomly that will sharpen my mind and improve memory? I have not attended school in over a year as well so this may be contributing to my newfound dumb-ness lol