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)

🙏

🤨

😮

Study guides

☆☆

Q: What is divisiblity rule for numbers 2to20?

Write your answer...

Submit

Related questions

No rule

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.

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

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

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.

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

No - because it's an odd number !

The only number by which four is divisible is two.

Pythagoras

pythagoras

Never.

There are infinitely many of them.

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

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

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.

Opposite numbers rule

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

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

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.