Divisibility rules
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Divisibility rule of 3 =sum of all the digits is a multiple of 3
Divisibility rule of 9= sum of all the digits is a multiple of 9
Divisibility rule of 11= (sum of the digits at even places)-sum of the digits at odd places)
Divisibility rule of 9= sum of all the digits is a multiple of 9
Divisibility rule of 11= (sum of the digits at even places)-sum of the digits at odd places)
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