Test the following numbers for divisibility by 6,9,11 (do not divide or factorise)
a)6 798 340
b)54 786 978
If the sum of the digits of a number is divisible by 3, then the number is divisible by 3.
If the even number is divisible by 3, then it is divisible by 6.
If the sum of the digits of a number is divisible by 9, then the number is divisible by 9.
if the difference of the sum of the digits at even places and odd places is 0 or divisible by 11, then the number is divisible by 11.
a)
The number is an even number.
The sum of the digits is
The number is neither divisible by 6 nor by 9.
The difference of the sum of the digits at even places and odd places is
The number is not divisible by 11.
b)
The number is an even number.
The sum of the digits is
The number is divisible by 6.
The number is divisible by 9.
The difference of the sum of the digits at even places and odd places is
The number is not divisible by 11.
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