Arectangular courtyard 3.78 metres long
and 5.25 metres wide is to be paved
exactly with square tiles, all of the same
size. what is the largest size of the tile
which could be used for the purpose ?
(a) 14 cm (b) 21 cm
(c) 42 cm (d) none of these

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?