Scott must choose a number between 67 and 113 that is a multiple of 5, 8, and 10. Write all the numbers that he could choose. If there is more than one number, separate them with commas.

Numbers need to be between 67 and 113

Start with the biggest multiple:

Multiples of 10: 70, 80, 90, 100, 110

All multiples of 10 are multiples of 5 [skip]

From multiples of 10, I check if they are multiple of 8:

70 (no)

80 (yes, 8 x10 = 80)

90 (no)

100 (no)

110 (no)

The answer is 80