3)
7168
divisible by 2 because the last digit is divisible by 2
NOT divisible by 3 because the sum of its digit (22) is not a multiple of 3
divisible by 4 because the last 2 digits (68) are divisible by 4
NOT divisible by 5 because the last digit (8) is neither 0 nor 5
NOT divisible by 6 (to be divisible y 6, it should be divisible by 2 and 3)
divisible by82 because the last 3 digits (168) ae divisible by 8
NOT divisible by 9 because the sum of its digit (22) is not a multiple of 9
NOT divisible by 10 because the last digit (8) is not 0
Having written the rules, you can easily apply them to solve the last 2 exercices.