divisibillty rule of 7
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Proving Divisibility Rules
Prove that when a number is divisible by 7 , 7, 7, the result when subtracting twice the last digit from the number formed by the remaining digits is a multiple of 7.
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Proving Divisibility Rules:
Prove that when a number is divisible by 7 , 7, 7, the result when subtracting twice the last digit from the number formed by the remaining digits is a multiple of 7.
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