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305) Divisibility with n

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ern5231: Master | Next Rank: 500 Posts; Posts: 226; Joined: Sun Aug 09, 2009 4:34 am

305) Divisibility with n

by ern5231 » Sat May 15, 2010 5:27 am

Is 12 divisible by 6n?
1) 20 is divisible by 2n
2) 6 is divisible by 3n

Last edited by ern5231 on Sat May 15, 2010 6:03 am, edited 1 time in total.

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Source: Beat The GMAT — Data Sufficiency | Sat May 15, 2010 5:27 am

pradeepkaushal9518: Legendary Member; Posts: 1309; Joined: Wed Mar 17, 2010 11:41 pm; Thanked: 33 times; Followed by:5 members

by pradeepkaushal9518 » Sat May 15, 2010 5:41 am

answer is B

1.20 is divisible by 2n given the value of n from 1,2,5,10 but n=5 or 10 doesnt give 12 divisble by 6n henec insufficeint
a and d out.

2. 6 is divisible by 3n give n= 1 and 2 for any value of n 12 will be didvisble by 6n henec sufficient.

hence B

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