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Mathematics 8 Online
OpenStudy (amber15):

is 1730 divisible by 21? just wondering if it is

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (amber15):

i dont think it is

OpenStudy (skullpatrol):

Why do you think that?

OpenStudy (amber15):

changed my mind i think it is yes

OpenStudy (rajee_sam):

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

OpenStudy (rajee_sam):

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

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