what is the divisibility rules of 7,8
Answers
Step-by-step explanation:
What is the Divisibility Rule of 7?
As per the divisibility rule of 7, the last digit of the given number is multiplied by 2, and the product is subtracted from the rest of the number. If the difference is 0 or a multiple of 7, then we say that the given number is divisible by 7. If we are not sure whether the resulting number is divisible by 7 or not, we repeat the same process with the resultant number. For example, in the number 154, let us multiply the last digit 4 by 2, which is 4 × 2 = 8. On subtracting 8 from 15, we get 7. 7 is divisible by 7 as it is the first multiple. Therefore, 154 is divisible by 7.
The Rule for 8: a number is divisible by 8 if the last three digits are evenly divisible by 8. For example, 17216. The last three digits are 216 and it is divisible by 8. Thus, 17216 is divisible by 8.