100, 150, 200, 250, 300, 350, 400, 450 . . .
200 + 300 + 150 + 250 = 900
The first six multiples of 50 are 50, 100, 150, 200, 250 and 300.
50, 100, 150, 200, 250, 300, 350, 400, 450, 500
200+100=300 150+150=300 300+0=300
50, 100, 150, 200, 250, 300, 350, 400, 450, 500
50, 100, 150, 200, 250, 300, 350, . . .
100, 50, 0, -50, -100
50, 100, 150, 200, 250, 300, 350, . . .
50, 100, 150, 200, 250, 300, 350 . . .
50, 100, 150, 200, 250, 300.
100, 150, 200, 250, 300, 350, 400, 450 . . .
200 + 300 + 150 + 250 = 900
50, 100, 150, 200, 250, 300, 350, 400 . . .
50, 100, 150, 200, 250, 300.
50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, . . .
The first six multiples of 50 are 50, 100, 150, 200, 250 and 300.