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Algebra

Blazing goIITian

Joined:	27 Dec 2010
Post:	1474

11 Feb 2012 23:46:03 IST

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216

p and c again!!

Mathematics

in how many ways can you arrange 21,31,41,51,61,71,81 in a line such that the sum of any 4 consecutive numbers is divisible by 3??

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prahlad kumar sharma

Cool goIITian

Joined: 21 Jul 2010

Posts: 88

12 Feb 2012 11:20:37 IST

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24.

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