Question

What is the Divisility test of 7

Answer 1

Step-by-step explanation:

To check if a number is evenlydivisible by 7: Take the last digit of the number, double it Then subtract the result from the rest of the number If the resulting number is evenly divisibleby 7, so is the original number.

Answer 2

Answer:

A number is divisible by 7 if it has a remainder of zero when divided by 7

Rule 1: Remove the last digit, double it, subtract it from the truncated original number and continue doing this until only one digit remains. If this is 0 or 7, then the original number is divisible by 7.

Rule 2: Take the digits of the number in reverse order, that is, from right to left, multiplying them successively by the digits 1, 3, 2, 6, 4, 5, repeating with this sequence of multipliers as long as necessary. Then add the products. If the resulting sum is divisible by 7, then the original number is divisible by 7.

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