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if the number is a 2 or more diget number, you add up all of the numbers in the number and when you have the sum, if the sum is divisible by 3 , the whole number is divisible by three
EX.
123=6, 6 is divisible by 3 so 123 is divisible by three
447=15 is divisible by 3 so 447 is divisible by 3
989=26 is *NOT* divisible by 3 so 989 is not divisible by three
this truly does work for every single number
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Why 3 multiple of 6?
Three is not a multiple of six. Six is a multiple of three. And three is a factor of six.
What is the third multiple three?
If you mean what is the multiple OF three, the answer is 9
How do we know if a number is divisible by 3?
If the sum of the digits is a multiple of three, the whole number is a multiple of three.
What 3 digit number is a factor of 4 and 7?
Anything three-digit would have to be a multiple, like 280.
What three digit number is a multiple of 7?
105 is a multiple of 7
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