Not Sure What To Title It - Integer Problem - The Beat The GMAT Forum

Not Sure What To Title It - Integer Problem

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pierce22884: Junior | Next Rank: 30 Posts; Posts: 13; Joined: Sun Sep 07, 2008 4:34 pm; Location: Dallas, TX

by pierce22884 » Tue Feb 16, 2010 4:20 am

I would appreciate it if the attached problem could be clearly explained to me.

Thanks in advance.[/img]

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Source: Beat The GMAT — Problem Solving | Tue Feb 16, 2010 4:20 am

papgust: Community Manager; Posts: 1537; Joined: Mon Aug 10, 2009 6:10 pmFollowed by: 252 members; Thanked: 653 times

by papgust » Tue Feb 16, 2010 4:26 am

This problem is discussed here. Please check this!

https://www.beatthegmat.com/tough-algebr ... tml#223216

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shashank.ism: Legendary Member; Posts: 1022; Joined: Mon Jul 20, 2009 11:49 pmFollowed by: 2 members; Location: Gandhinagar; Thanked: 41 times

by shashank.ism » Wed Feb 17, 2010 12:00 pm

let the box thing represented by '
so m' = 3m when m is odd
m' = 1/2 m when m is even
9' = 3x9 =27, 6'=1/2x6 =3 so 9'x6' = 27x3 = 81
chk for options
81' = 81x3 No
54' = 54/2 = 27 No
36' = 36/2 = 18 No
27' = 27x3 = 81 yes ---- Ans D
18' = 18/2 = 9 No

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money9111: Legendary Member; Posts: 2109; Joined: Sun Apr 19, 2009 10:25 pmFollowed by: 79 members; Location: New Jersey; Thanked: 109 times; GMAT Score:640

by money9111 » Wed Feb 17, 2010 12:53 pm

81 yes ---- Ans D

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shashank.ism: Legendary Member; Posts: 1022; Joined: Mon Jul 20, 2009 11:49 pmFollowed by: 2 members; Location: Gandhinagar; Thanked: 41 times

by shashank.ism » Wed Feb 17, 2010 12:59 pm

money9111 wrote:81 yes ---- Ans D

Thanks for ur constructive transparent and defensive post ...It really added value to my solution when the blackened thing was copied and simply pasted...

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money9111: Legendary Member; Posts: 2109; Joined: Sun Apr 19, 2009 10:25 pmFollowed by: 79 members; Location: New Jersey; Thanked: 109 times; GMAT Score:640

by money9111 » Wed Feb 17, 2010 1:09 pm

hey you didn't start the post so I'm free to comment, as per my stance... since you know all the answers i don't know why you just don't take the exam today and get it over with.

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harsh.champ: Legendary Member; Posts: 1132; Joined: Mon Jul 20, 2009 3:38 amFollowed by: 6 members; Location: India; Thanked: 64 times; GMAT Score:760

by harsh.champ » Wed Feb 17, 2010 10:20 pm

pierce22884 wrote:I would appreciate it if the attached problem could be clearly explained to me.

Thanks in advance.[/img]

Hey pierce22884,
Though papgust has pointed out the earlier thread but i guess some ppl didn't see the trap in the question,so I will lay emphasis again. This is a very important ques. where you need to pay attention to details.If you see clearly,the answer choices are in the box form not the normal answer choices.The answer is 81 but in the box form it will be "box-27" since for odd no.s the no. becomes 3 x no. in the box [spoiler]= 3 x 27 =81 .Hence ,the answer will be 27.

[/spoiler]Nice trap,eh?

It takes time and effort to explain, so if my comment helped you please press Thanks button

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