short trick to find any no divisible by 7
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Step-by-step explanation:
How to Tell if a Number is Divisible by 7
Take the last digit of the number you're testing and double it.
Subtract this number from the rest of the digits in the original number.
If this new number is either 0 or if it's a number that's divisible by 7, then you know that the original number is also divisible by 7.
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