Division facts from 0 to 20

Rule: If it ends with a 0, 2, 4, 6, or 8 it is divisible by 2

for divisibility rule of 3 add all digits if it is a part of the table of 3 it is divisible

Rule: If the last two digits are a multiple of 4

(or if the last two digits are 00) for 4

Rule: If the last two digits are a multiple of 4

(or if the last two digits are 00) for 5

Rule: If it is divisible by 2 and by 3 for 6

Rule: If the sum of the digits are a multiple of 9 for 9

Rule: If the last digit is 0 for 10

the correct answer is 5 6 and 7

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.