Best Answer

In most cases, it is easier to do the division than to use some special divisibility rule. Divisibility rules only save you time in some special cases, such as:

  • 2, 4, 8, 5, 10, 25 (look at the last digit or digits)
  • 3, 9 (add the digits, and see if it is divisible by 3 or by 9, respectively)
  • 7, 11, and 13 (separate the last three digits and subtract from the remaining number)
User Avatar

Wiki User

โˆ™ 2011-01-10 14:08:39
This answer is:
User Avatar
Study guides


20 cards

A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

See all cards
335 Reviews

Add your answer:

Earn +20 pts
Q: What is divisiblity rule for numbers 2to20?
Write your answer...
Related questions

Divisiblity rule for 4?

No rule

Divisiblity rule for 119?

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.

What is divisiblity rule for number 6?

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

What is the divisiblity rule of 9?

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.

What is the divisiblity rule for 9?

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

What is the divisiblity rule for the number 8?

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

What is the smallest number that is divisiblity by


What are the divisiblity rules for 1 - 10?


What is a divisiblity rule?

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

What is the rule in adding rational numbers?

what is the rule in adding rational numbers

What is the divisiblity rule for 15?

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.

What is the position to term rule of these numbers?

The rule in this case is that there are no numbers in any position.

Is 3281 divisiblity by 4?

No - because it's an odd number !

Divisiblity of 4?

The only number by which four is divisible is two.

Who said numbers rule world?


Who said numbers rule the universe?


What is the rule for subtracting positive numbers?


What is a rule pertaining to numbers?

There are infinitely many of them.

What is the divisiblity test of three?

If the sum of the digits is a multiple of 3, yhen the number is divisible by 3.

Why is the rule of multiplication and division signed numbers is true?

If it were not true, it would not have become the rule!

What is a pattern rule -4?

To guess a rule for a pattern, you need several numbers, not just one. Of course, you can invent any rule, for example, "all numbers in the sequence are equal to -4", or some more complicated rule.

What is the restriction on the rule that says when two numbers are multiplied within a square root you can split it into a multiplication of two square roots?

Opposite numbers rule

Example of rule method?

The rule method is used to describe any set of numbers, so put any sequence of numbers in brackets and there you go.

Is 420 a multiple of 2?

Yes,because we know the divisiblity test of 2 that is last no. should be odd.

How do you find the rule of a sequence of numbers?

Since a given sequence of numbers can be designed to follow any rule, you have to use a system of trial and error to see if you can discover the rule. Sometimes the rule is obvious, sometimes it is extremely complicated. Try to invent a rule which would produce the sequence that you observe.