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0 / 60 seg.
John bought a used car for $600 and sold it to Mary for $800. He later bought it back for $1000 and resold it for $1200. How much profit did John make?
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Clue
1ST METHOD: 7⁄.7 X 7⁄.7 2ND METHOD: 77⁄.77
5. HE MAKES 4 CIGARETTES WITH THE 16 BUTTS. AFTER SMOKING THE 4 CIGARETTES, HE WILL HAVE 4 MORE BUTTS TO MAKE ANOTHER CIGARETTE
$400. HE MADE A PROFIT OF $200 EACH TIME HE SOLD THE CAR
20 TIMES. THEY ARE 9, 19, 29, 39, 49, 59, 69, 79, 89, 99 (2 TIMES) FOLLOWED BY 90, 91, 92, 93, 94, 95, 96, 97, 98
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