The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.
There is no easy rule for divisibility by 34.
2 squared 1 = 4 so the divisibility rule is that it is divisible by 1, 2 and 4.
By tautology. If it did not work, it would not be a divisibility rule!
A divisibility rule is a statement of procedures to determine divisibility. For example:"A number is divisible by 2 if it ends with 0, 2, 4, 6 or 8".It does not make any sense to divide such a sentence by 2 or 895 or any other number!
If the number is even, it's divisible by 2.
The divisibility rule for 22 is that the number is divisible by 2 and by 11. Divisibility by 2 requires that the number ends in 0, 2, 4, 6 or 8. Divisibility by 11 requires that the difference between the sum of the the digits in odd positions and the sum of all the digits in even positions is 0 or divisible by 11.
There is no divisibility rule for 13 because it is a prime number. If you are thinking: why is there a divsibility rule for 2 and 3 then. Well, i don't know so go look it up on google.
If the number is even, it's divisible by 2.
The number must be divisible by 2 and by 7.
What is the divisblity rule by 8
There are two ways of answering this.Check the number for divisibility by 2.Check the quotient for divisibility by 2.Check the quotient for divisibility by 2.Check the quotient for divisibility by 2.Check the quotient for divisibility by 2.Check the quotient for divisibility by 2.For large numbers, the check can be restricted to the number formed by the last six digits.