Question

What are the rules for dividing each number from 1 to 10

Answer 1

• Any integer (not a fraction) is divisible by 1

• The sum of the digits is divisible by 3

• The last 2 digits are divisible by 4

• The last digit is 0 or 5

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

• 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)

• The last three digits are divisible by 8

• The sum of the digits is divisible by 9

• The number ends in 0

• Add and subtract digits in an alternating pattern (add digit, subtract next digit, add next digit, etc). Then check if that answer is divisible by 11.

• The number is divisible by both 3 and 4 (it passes both the 3 rule and 4 rule above)

Answer 2

Any number can be divided by one, as long as it is an integer