Show PUZZLE IN change places and keep th gebie from the Enem fe here is a little puzzle ot the moving claes that our readers will probably find make a diagram of any convenient conven lent size sim liar to that shown li our and provide six counters alree marked to represent boyts and three to represent geese place the geese on the disks 1 2 and 3 and the foxes on the disks numbered 10 11 and 12 now this I 1 is this by moving one at a time fox and goose alternate 1 along a straight line from one disk to the next one try to get the foxes oa 1 2 and 3 and the geese on 10 11 and 12 that Is make them exchange places in the fewest possible moves but you must be careful never to let a fox and goose get within reach of each other or there will be trouble this rule ou will find prevents your moving the fox from 11 on the first move as on either 4 or 6 he would be within tach of a goose it also pre vents your moving a fox from 10 to 9 or from 12 to 7 it you play 10 to 5 then your next moe may be 2 to 9 with a goose which you could not have played it the fox had not pre gone from 10 it Is perhaps unnecessary to say that only one fox or one goose can be on a d sk at the same time now what Is the smallest number of moves necessary to make the foxes and geese change |