Q: What is the rule of divisiblity for 13?

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The rule to decide if a number is divisible by 9 is to look at the sum of the digits. If the sum of the digits is divisible by 9, then so is the number.

To find out if a number is divisible by 8 the number must be divisible by 2 and 4!

60.

-9

A number is divisible by 15 if it is divisible by 5, and by 3. For example, 165 is divisible by 15, since it ends in 5, and the sum of its digits is divisible by 3.

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No rule

if the number is divisible by 2 and 3 then it is divisible by 6 =D

The rule to decide if a number is divisible by 9 is to look at the sum of the digits. If the sum of the digits is divisible by 9, then so is the number.

Add the digits together and if the result is divisible by 9, the original number is divisible by 9.

To find out if a number is divisible by 8 the number must be divisible by 2 and 4!

60.

-9

A number is divisible by 15 if it is divisible by 5, and by 3. For example, 165 is divisible by 15, since it ends in 5, and the sum of its digits is divisible by 3.

Just carry out the division, and see if you get an integer. It isn't worth the trouble to memorize or, worse, figure out divisibility rules for all sorts of large numbers.

it is a rule that is followed when wanting to see if a number can go into another number. ex: the divisibility rule for 3 is if the sum of the numbers is divisible by three then the whole number is divisible by 3. if the problem is 75, 3 can go into it because the sum of the numbers equals 12, look 7+5 = 12 . you can look up other divisibility rules on here but if found please answer my question.... what is the divisibility rule for 7? Hope that helped, me888100 p.s. this was written by a 13 yr old

No - because it's an odd number !

The only number by which four is divisible is two.