amber15
is 1730 divisible by 21? just wondering if it is



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skullpatrol
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Any ideas?

amber15
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i dont think it is

skullpatrol
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Why do you think that?

amber15
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changed my mind i think it is yes

rajee_sam
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it should be divisible both by 3 and by 7 then it will be

rajee_sam
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if you add all the digits it adds up to 11 which is not divisible by 3 . so this is not divisible by 21