How many numbers is 560 divisible by
There are many shortcuts or tricks that allow you to test whether a number, or dividend, is divisible by a given divisor. This page focuses on the mostfrequently studied divisibility rules which involve divisibility by 2, 3 , 4, 5, 6, 8, 9, 10, and by 11
What is the divisibility by 2 Rule?
Answer:Almost everyone is familiar with this rule, which states that any even number can be divided by 2 .
Even numbers are multiples of 2. A number is even if it ends in 0,2,4,6, or 8.
Examples of numbers that are even and therefore pass this divisibility test
Number  Explanation 
12  Since the last digit is a 2, the entire number, 12, is an even number and therefore divisible by 2 
318  Since the last digit is an 8, this is an an even number and therefore divisible by 2 
310  Since the last digit is 0, this is an an even number and therefore divisible by 2 
32,814  Since the last digit is a 4, this is an an even number and therefore divisible by 2 
Examples of numbers that are do not pass this divisibility test because they are not even.
Number  Explanation 
3  3 is not an even number. 
103  not an even number. 
150  not an even number. 
221  not an even number. 
Practice Quiz on divisibility by 2
What is the divisibility by 3 rule?
Answer:Rule: A number is divisible by 3 if the sum of its digits is divisible by 3.
375, for instance, is divisible by 3 since sum of its digits (3+7+5) is 15. And 15 is divisible by 3.
number  Explanation 
12  $$ 1 +2 = 3$$ and 3 is divisible by 3 
36  $$ 3 + 6 = 9 $$ and 9 is divisible by 3 
102  $$1+0+2 = 3$$ and 3 is divisible by 3 
100,002,000  $$ 100,002,000 = 1 +0 +0 +0 +0 +2 +0 + 0 +0 =3$$ and 3 is divisible by 3 
36  $$ 3 + 6 = 9 $$ and 9 is divisible by 3 
Number  Explanation 
14  1+4 = 5 and since 5 is not divisible by 3, so 14 is also not. 
124  $$1 + 2+ 4 = 7$$ which is no good, since 7 is not evenly divisible by 3. 
100,002,001  $$1+0 +0 +0 +2 +0 + 0 + 1= 4$$ so this very large also does not pass this divisibility test 
Practice Quiz on divisibility by 3
What is the divisibility by 4 rule?
Answer:Rule: A number is divisible by 4 if the number's last two digits are divisible by 4.
9,312, for instance, is divisible by 4 since its last 2 digits are 12. And 12 is divisible by 4.
Examples of numbers that are divisible by 4
Number  Explanation 
112  since the last two digits, 12, are divisible by 4, the number 112 is also divisible by 4. 
10,948  the last two digits, 48, are divisible by 4. Therefore, the whole number is also. 
100,002,088  Yep, this satisfies rule because 88 is divisible by 4! 
12,036  36 and 36 is evenly divided by 4, so 12,036 passes the test! 
Examples of numbers that are do not pass this divisibility test
Number  Explanation 
113  since the last two digits, 13, are not divisible by 4, the whole number does not pass this divisibility test. 
10,941  the last two digits, 41, are not de visible by 4. Therefore, the whole number does not satisfy the rule for 4. 
100,002,014  those last two digits, 14, do not work 
1,011  11 is not divisible by 4, so 1,011 fails this test 
Ever wonder why these rules work. The test for 4 makes sense if you just break down the numbers. Think about what this rule says: "All that matters is whether or not the last two digits are divisible by 4." Let's look at why this rule is true.
Examine some three digit numbers 124 is the same as 100 + 24, and we know that 100 is divisible by 4 so all that matters here is whether or not 24, or the last two digits, are divisible by 4. The same could be said for any three digit number 224 = 200 + 24, and we know that 200 is divisible by 4 so again all that we're worried about are these last two digits.
 Any multiple of 100 is divisible by four! Whether you're talking about 300, 700, 1000, 1100, 123,00 All of these multiples of 100 are divisible by 4, which means that all that we ever have to worry about is the last two digits!
Practice Quiz on divisibility by 4
What is the divisibility by 5 rule?
Answer:Rule: A number is divisible by 5 if its last digit is a 0 or 5.
Examples of numbers that are divisible by 5 and satisfy this rule
Number  Explanation 
10  since the last digit is 0, this number is divisible by 5 
15  since the last digit is 5, this number is divisible by 5 
45  since the last digit is 5, this number is divisible by 5 
Examples of numbers that are not divisible by 5.
Number  Explanation 
11  To be divisible by 5, the last digit must be 0 or 5. So 11 fails this test. 
19  To be divisible by 5, the last digit must be 0 or 5. So 19 fails this test. 
Practice Quiz on divisibility by 5
What is the divisibility by 6 rule?
Answer:Since 6 is a multiple of 2 and 3, the rules for divisibility by 6 are a combination of the rule for 2 and the rule for 3.
In other words, a number passes this divisibility test only if it passes the test for 2and the for 3.
Rule: A number is divisible by 6 if it is evenand if the sum of its digitsis divisible by 3.
Examples of numbers that are divisible by 6
Number  Explanation 
114 

241,122 

Number  Explanation 
207 

241,124 

Practice Quiz on divisibility by 6
Divisibility by 8 Rule
Rule A number passes the test for 8 if the last three digits form a number is divisible 8.
Examples of numbers that satisfy this rule and are divisible by 8
Number  Explanation 
9,640  The last 3 digits , 640, are divisible by 8 . Therefore , 9,640 is divisible 8 as well! 
77,184  The last 3 digits , 184, are divisible by 8 . Therefore, 77,184 is divisible 8 as well! 
20,233,322,496  The last 3 digits , 496, are divisible by 8 . Therefore , 20,233,322,496 is divisible 8 as well! 
Examples of numbers that are do not pass this divisibility test
Number  Explanation 
9,801  Since last 3 digits are not divisible by 8, the entire number 9,801 is not. 
32,344,588  Since last 3 digits are not divisible by 8, the entire number 32,344,588 is not. 
Practice Quiz on divisibility by 8
Divisibility by 9 Rule
Rule A number is divisible by 9 if the sum of the digits are evenly divisible by 9.
Examples of numbers that satisfy this rule and are divisible by 9
Number  Explanation 
4,518  $$ 4+5+1+8=18$$ which is divisible by 9, so 4,518 is divisible by 9 
6,993  $$ 6+9+9+3 = 27 $$ which is divisible by 9 so , the entire number is divisible by 9. 
Examples of numbers that are do not pass this divisibility test
Number  Explanation 
6,992  $$ 6+9+9+2 = 26 $$ which is not divisible by 9 so, the entire number is not divisible by 9. 
4,517  $$ 4+5+1+7=17$$ which is not divisible by 9 so, the entire number is not divisible by 9. 
Practice Quiz on divisibility by 9
Divisibility by 10 Rule
Rule A number passes the test for 10 if its final digit is 0
Use the divisibility calculator below to determine if any number is divisible by ten. Type in any number that you want, and the calculator will use the rule for divisibility by 10 to explain the result.
Examples of numbers that are divisible by 10
Number  Explanation 
190  Last digit is 0, that's all that is needed for a number to be divisible by 10. 
231,110  Last digit is 0, that's all that is needed for a number to be divisible by 10. 
Examples of numbers that do not pass this divisibility test
Number  Explanation 
31,205  Since the last digit is not 0, this number is not divisible by 10. 
100,002  Since the last digit is not 0, this number is not divisible by 10. 
Practice Quiz on divisibility by 10
Divisibility by 11 Rule
Rule A number passes the test for 11 if the difference of the sums of alternating digits is divisible by 11.(This abstract and confusing sounding rule is much clearer with a few examples)
Use the divisibility calculator below to determine if any number is divisible by eleven. Type in any number that you want, and the calculator will explain whether or not it's divisible by 11 based on this rule.
Examples of numbers that satisfy this rule
Number  Explanation 
119,777,658  $$ (1+ 9 + 7 + 6 + 8)  (1+ 7 + 7 +5) = 31  20 = 11 $$ and since 11 is evenly divisible by 11, the entire number is also 
10,813  $$(1+8+3)  (0+1) = 121 =11 $$ 
25, 784  $$ (2+ 7 + 4)  (5+8) = 13  13 =0 $$ Yes, this does indeed work. In case you found this one, a bit confusing, remember that any number evenly divides 0. Think about it, how many 11's are there in 0? None, right. Well that means that 11 divides zero, zero times! 
Examples of numbers that do not pass this divisibility test
Number  Explanation 
10,823  $$ (1+8+3)  (0+2) = 12 2 =10 $$. No, no good. This one fails 
35, 784  $$ (3 + 7 + 4)  (5+8) = 14  13 = 1 $$ 
12,347, 496, 132  $$ (1+3+7+9+3)  (2 + 4 +4 + 6 + 3)= 23 19 = 4$$ 
Practice Quiz on divisibility by 11
A word of caution about hand held calculators
Keep this in mind before you buy graphing calculator: Even many of the best graphing calculators or this free online graphing calculator lose their accuracy when they start dividing large numbers such as 12,347,496,132. Try to divide that large number by 11. If your calculator outputs that 12,347,496,132 is divisible by 11, your calculator IS WRONG (Look at the last example at the bottom for details). When you're dealing with exceedingly large numbers, you should rely, whenever possible, on the rules on this page rather than a scientific or a graphing calculator.
So, you may be asking yourself why is this page's calculator more accurate than that graphing calculator you bought?
 The answer is : the calculators on this page use the rules for divisibility to calculate their answers (instead of the division algorithm). Your hand held calculator uses algorithms that work for all numbers and, if you're really interested, in learning more about why computers (not just calculators) do not accurately divide huge numbers look up floating point error, sometimes called rounding error.
 Did selfie sticks die out
 How do you recognise Bayes theorem
 How does oxygen change to ozone
 How will AI impact the PPC industry
 What is coagulation in water
 How is doomsday described in Hinduism
 How can I learn theoretical physics
 Which artist sang the song Delemma
 In laymans terms can you explain Macrophilia
 What is println in Java
 What is SpoonJoys revenue model
 Which anime villain actually had a point
 What is the best Proxy server
 How do you choose knitting yarn
 How can I become a travelling photographer
 What color does black dye fade to
 How does illegal immigration affect you materially