145
Look up long division or do this:
870/6
290/2
145/1
145
45
435
174
39.5455
14.5
217.5
217.5
870 ÷ 6 = 145
No
870 can be divisible by 2, 3, 5, 6, and 10
No. But 870 is divisible by 3 (because 8+7+0 = 15 -> 1 + 5 = 6 and 6 is divisible by 3). 870/3 = 290.
870 miles divided by 22 miles per gallon =gallons 870/22 = 39.5 gallons
870 is divisible by 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435 and 870. 870, 1740, 2610 and so on are divisible by 870.