what is the divisibility rule of seven ?
plz give answer like that class 4 student can understand
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divisible rule of 7
Adding 5 times the last digit to the rest gives a multiple of 7. (Works because 49 is divisible by 7.)
Subtracting 2 times the last digit from the rest gives a multiple of 7. (Works because 21 is divisible by 7.)
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