Amerchant can place 8 large boxes or 10 small boxes into a carton for shipping. in one shipment, he sent a total of 96 boxes. if there are more large boxes than small boxes, how many cartons did he ship?

To figure this out, you should think about the multiples of 10 boxes you could have.

If I had 10 small boxes, there would need to be 86 large boxes. 86 is not evenly divisible by 8 so that doesn't work.

If I had 20 small boxes, there would be 76 large boxes. 76 is not evenly divisible by 8.

If I had 30 small boxes, there would be 66 large boxes. 66 is not evenly divisible by 8.

If I had 40 small boxes, there would be 56 large boxes. 56 is every divisible by 8.

4 cartons of 10 small boxes and 7 cartons of 8 large boxes would be needed. This is a total of 11 cartons.