the scout leader

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sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Mon Mar 26, 2012 12:56 am

If five more scouts are added to a scout camp group, would the scout leader be able to divide the group into teams of 10 scouts each without any remainder?
(1) Initially, the number of scouts in the group was not divisible by ten.
(2) If 25 scouts are added to the group, the group can be divided into teams of 10 without any remainder.

The mind is everything. What you think you become. -Lord Buddha

Sanjeev K Saxena
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The Princeton Review - Manya Abroad
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Source: Beat The GMAT — Data Sufficiency | Mon Mar 26, 2012 12:56 am

seal4913: Master | Next Rank: 500 Posts; Posts: 106; Joined: Wed Mar 23, 2011 4:56 pm; Thanked: 8 times

by seal4913 » Mon Mar 26, 2012 2:28 pm

I would have to say B.

As statement 1 says the orginal number isn't divisible by 10. So say 15 and add 5 then it is. But if it's 11 and add 5 then it isn't.

statement 2 you are adding 25. So if you have 15 and add 25 then it's 40 and meets the factor and then 15 plus 5 is divisible by 10. This would work with any number that you could start with that makes it divisible by 10. So i started with 25 and 25 that's 50; then 25 plus 5 is 30 fits.

Am i right?

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sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Tue Mar 27, 2012 1:29 am

seal4913 wrote:I would have to say B.

As statement 1 says the orginal number isn't divisible by 10. So say 15 and add 5 then it is. But if it's 11 and add 5 then it isn't.

statement 2 you are adding 25. So if you have 15 and add 25 then it's 40 and meets the factor and then 15 plus 5 is divisible by 10. This would work with any number that you could start with that makes it divisible by 10. So i started with 25 and 25 that's 50; then 25 plus 5 is 30 fits.

Am i right?

Yes, you are right, seal4913. Just keep it up!

The mind is everything. What you think you become. -Lord Buddha

Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com

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sam2304: Legendary Member; Posts: 1239; Joined: Tue Apr 26, 2011 6:25 amFollowed by: 26 members; Thanked: 233 times; GMAT Score:680

by sam2304 » Tue Mar 27, 2012 2:10 am

IMO B.

same approach as explained by seal

Getting defeated is just a temporary notion, giving it up is what makes it permanent.
https://gmatandbeyond.blogspot.in/

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