Problem 316
Describe how to decide if a number is divisible by
a. 2. b. 3. c. 4. d. 5. e. 6.
Solution
a. Only if unit digit is a even number (0,2,4,6,8)
b. Only if the sum of its digits is divisible by 3
c. Only if last 2 digits of the number is divisible by 4
d. Only if its units digit of the number is a 0 or a 5
e. Only if it is divisible by both 2 and 3