Question

Check of following number are devisible by 7 . use
the divisiblity by rule.
2191​

Answer 1

Answer:

when subtracting twice the last digit from the number formed by the remaining digits is a multiple of 7, then the number is divisible by 7.

here, 2191

twice of last digit is 2

subtract 2 from 219

we get, 217

and 217 is divisible by 7

therefore, 2191 is divisible by 7.

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Answer 2

Answer:

Yes.

Step-by-step explanation:

In order to test this, you must take the last digit of the number you're testing and double it. Then, subtract this number from the rest of the remaining digits. If this new number is either 0 or if it's a number that's divisible by 7, then then original number is divisible by 7.

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