Answer:

1. 16 and 20

2. 40 and 300

3. 60

4. 70

5.  35 and 105

Step-by-step explanation:

divisibility rule for 2 to 10

for 2

The last digit is even (0,2,4,6,8)

for 3

The sum of the digits is divisible by 3

for 4

The last 2 digits are divisible by 4

for 5

The last digit is 0 or 5

for 6

Is even and is divisible by 3 (it passes both the 2 rule and 3 rule above)

for 7

Double the last digit and subtract it from a number made by the other digits. The result must be divisible by 7. (We can apply this rule to that answer again)

for 8

when

The last three digits are divisible by 8

for 9

when The sum of the digits is divisible by 9

for 10

The number ends in 0