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Home > Pre-Algebra calculators > Divisibility rule example
Divisibility rule of 79 example ( Enter your problem )
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78. Divisibility rule of 78 example
(Previous example)		80. Divisibility rule of 80 example
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79. Divisibility rule of 79 example


1. Check whether 21014 is divisible by 79 or not?

Solution:
Divisibility rule of 79 :
8 times the last digit and add it to the rest of the number.
If the answer is divisible by 79, then number is also divisible by 79.
(Apply this rule to the answer again if necessary)

`2101color{red}{4}=>2101 + color{red}{4} xx 8 = 2101 +32 = 2133`

`213color{red}{3}=>213 + color{red}{3} xx 8 = 213 +24 = 237`

`23color{red}{7}=>23 + color{red}{7} xx 8 = 23 +56 = 79`

Here 79 is divisible by 79.
`:.` 21014 is divisible by 79.


2. Check whether 26386 is divisible by 79 or not?

Solution:
Divisibility rule of 79 :
8 times the last digit and add it to the rest of the number.
If the answer is divisible by 79, then number is also divisible by 79.
(Apply this rule to the answer again if necessary)

`2638color{red}{6}=>2638 + color{red}{6} xx 8 = 2638 +48 = 2686`

`268color{red}{6}=>268 + color{red}{6} xx 8 = 268 +48 = 316`

`31color{red}{6}=>31 + color{red}{6} xx 8 = 31 +48 = 79`

Here 79 is divisible by 79.
`:.` 26386 is divisible by 79.


3. Check whether 27966 is divisible by 79 or not?

Solution:
Divisibility rule of 79 :
8 times the last digit and add it to the rest of the number.
If the answer is divisible by 79, then number is also divisible by 79.
(Apply this rule to the answer again if necessary)

`2796color{red}{6}=>2796 + color{red}{6} xx 8 = 2796 +48 = 2844`

`284color{red}{4}=>284 + color{red}{4} xx 8 = 284 +32 = 316`

`31color{red}{6}=>31 + color{red}{6} xx 8 = 31 +48 = 79`

Here 79 is divisible by 79.
`:.` 27966 is divisible by 79.


4. Check whether 22959 is divisible by 79 or not?

Solution:
Divisibility rule of 79 :
8 times the last digit and add it to the rest of the number.
If the answer is divisible by 79, then number is also divisible by 79.
(Apply this rule to the answer again if necessary)

`2295color{red}{9}=>2295 + color{red}{9} xx 8 = 2295 +72 = 2367`

`236color{red}{7}=>236 + color{red}{7} xx 8 = 236 +56 = 292`

`29color{red}{2}=>29 + color{red}{2} xx 8 = 29 +16 = 45`

Here 45 is not divisible by 79.
`:.` 22959 is not divisible by 79.


5. Check whether 26417 is divisible by 79 or not?

Solution:
Divisibility rule of 79 :
8 times the last digit and add it to the rest of the number.
If the answer is divisible by 79, then number is also divisible by 79.
(Apply this rule to the answer again if necessary)

`2641color{red}{7}=>2641 + color{red}{7} xx 8 = 2641 +56 = 2697`

`269color{red}{7}=>269 + color{red}{7} xx 8 = 269 +56 = 325`

`32color{red}{5}=>32 + color{red}{5} xx 8 = 32 +40 = 72`

Here 72 is not divisible by 79.
`:.` 26417 is not divisible by 79.


6. Check whether 31473 is divisible by 79 or not?

Solution:
Divisibility rule of 79 :
8 times the last digit and add it to the rest of the number.
If the answer is divisible by 79, then number is also divisible by 79.
(Apply this rule to the answer again if necessary)

`3147color{red}{3}=>3147 + color{red}{3} xx 8 = 3147 +24 = 3171`

`317color{red}{1}=>317 + color{red}{1} xx 8 = 317 +8 = 325`

`32color{red}{5}=>32 + color{red}{5} xx 8 = 32 +40 = 72`

Here 72 is not divisible by 79.
`:.` 31473 is not divisible by 79.



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