A northbound bus returns to the bus stop every 20 minutes. The southbound bus returns to the bus stop every 25 minutes.How long will it be before both of the buses are at the bus stop at the same time again
100 minutes because 20,40,60,80,100,120 25,50,75,100,125 They have 100 in common. It will take the northbound bus 5 stops and the southbound bus 4 stops to be at the same bus stop
