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The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.

Q: Why does divisibility rule for 2?

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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.

the divisibility rule for 2 is: The number is even;the last digit ends with a 2,4,6,8,10, etc.The divisibility rule fir 3 is: The sum of the number is divisible by 3The divisibility rule for 4 is: The last two digits are divisible by 4The divisibility rule for 5 is: The number ends with a 5 or 0The divisibility rule for 6 is: The sum CAN be divisible by 2 and or 3The divisibility rule for 9 is: The sum of the number is divisible by 9The divisibility rule for 10 is : The number ends with a 0

The divisibility rules of 4 and 9 are combined to make the divisibility rule of 36.

By tautology. If it did not work, it would not be a divisibility rule!

why does the divisibility rule work for 4

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.