in fact, it's not that far removed from the st. ives riddle our children at the gate were talking about. both of these problems have elegant solutions by the recognition of the simple pattern of the powers of seven that we see. now, several centuries later, we find slightly more sophisticated kinds of problems and solutions in 6th-century b.c. india. the medical treatise sushruta samhita gives us this problem: how many combinations can be made out of six different tastes: bitter, sour, salty, sweet, astringent, and hot? by taking them one at a time, two at a time, three at a time, and so on, we learn that there are in fact 63 combinations. this was important in ayurvedic medicine because it gave ancient physicians a way to work out which medical substance would best match a patient's ailments. now, there are two things that are going on here. on the one hand, we're asking for the number of possible combinations, or subsets, of the six different spices. this number, as we see, is 63, which is 2^6 - 1. now, notice the sixth power and six

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he ives in baltimore now.dimitri returns home to st. mary's county when he can. can. reeves' father: "we laugh because he'll give us money-- you is for you guys.' he helps around the house, because a lot of things i can't do."dad lost his leg in a car accident-- has diabetes. diabetes. man: "he ot some do-righh in him." (:02)mom has a rare kidney disease.man (con't): "gotta have some kinda legal hustle outthere."money on the street goes to ttem. them. woman: "he make you wwnna spend your money. everybody don't have chariima like thatt but he can ccpture an audience." audience." woman: "oh, it brings teaas to my eyes. to hear about his parents, both had ormal jobs.stuff."he's - jobs. dmitri reeves: "i used to work at ihop. (cut) i would mess up on some orders, but they loved my personality (laughter)." bbt, normal jobs don't transllte to dimiiri's dreams. dreams. yollnda: "he's down there, and he's saying..." (dances) (dances)dmitri reeves: "i don'' wanna be at home, sitting there mooching ff them orrbeing a burdon on them. i wanna make ssmething offmyself."he wants a