Brigit, the webmaster and 6 other Copagian live around the perfectly circular Copag Lake. They are Alain, Brigit, Christian, Delma, Eric, Felicity and Gaston, and as the logically minded people they are, they live clock-wise in that order around the lake. They are also somewhat eccentric, so they have ordered that all traffic, including pedestrian traffic, may only move around the lake in a clock-wise direction.
Their houses are separated from their next-door neighbours by a prime number of metres, each number being different. Alain has to walk 251 metres to Delma's; Brigit 312 to Felicity's; Christian 356 to Gaston's; Eric 382 to Brigit's; Felicity 206 to Alain's; Gaston 271 to Christian's.
How much further does Alain have to go to see Gaston than Gaston has if he wants to visit Alain?
2006-09-23
03:01:23
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14 respostas
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perguntado por
Leo J
3
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Matemática