Question

Divisibility rule of 13.​

Answer 1

Answer:

Step-by-step explanation:

Divisibility rules/Rule 1 for 13 proof. Truncate the last digit, multiply it by 4 and add it to the rest of the number. The result is divisible by 13 if and only if the original number was divisble by 13. This process can be repeated for large numbers, as with the second divisibility rule for 7.

Answer 2

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Answer:

Truncate the last digit, multiply it by 4 and add it to the rest of the number. The result is divisible by 13 if and only if the original number was divisble by 13. This process can be repeated for large numbers, as with the second divisibility rule for 7.

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