There are 120 chairs for 2 classrooms, how many chairs for 6 rooms?

Since there are 120 chairs for 2 classrooms then you add 120 with 120 or multiply 120 with 2. for for classrooms. you will get 240 for 4 classrooms. Then for 6 classrooms, you add 240 with 120 for 6 classrooms. therefore you will get 360 chairs in 6 rooms.

120 chairs = 2 classrooms

240 chairs= 4 classrooms

360 chairs = 6 classrooms.