For question#3 it asks which of the following numbers are divisible by 8. Even though I figured it out, what is the divisibility rule for 8 so I can figure this out faster?
For question#15 it states: When the positive integer n is divided by 3, the remainder is 2 and when n is divided by 5, the remainder is 1. What is the least possible value of n?
I would greatly appreciate an explanation to the answer.
Thanks in advance!