Problem 4
 (a) three friends are packing sweets into gift boxes. they agree that
 each box should contain the same number of sweets, but they are
 each working in separate locations with their own pile of sweets so
 cannot share boxes. gwen has 286 sweets, bill has 390 sweets and
 zeta has 468 sweets. if they put the largest number of sweets into
 each box that they can and they use up all their sweets, how many
 boxes of sweets will they pack?
 (b) use the euclidean algorithm to find the highest common factor of
 8008 and 24255 (you need to show all working).