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Bens4vcobra: Senior | Next Rank: 100 Posts; Posts: 76; Joined: Thu Feb 19, 2009 12:10 pm; Thanked: 3 times; Followed by:2 members

Need help with this PS question.

by Bens4vcobra » Mon Jun 20, 2011 4:08 pm

For all positive integers m, (m) (with a box around it) = 3m when m is odd and (m) (box around it) = 1/2m when m is even. Which is the equal to (9) X (6)? () = box

A)81
B)54
C)36
D)27
E)18

"It takes no ability to give effort. Toughness is not God-given; it's a choice. The discipline to execute is a habit." - Nick Saban

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MBA.Aspirant: Master | Next Rank: 500 Posts; Posts: 401; Joined: Tue May 24, 2011 1:14 am; Thanked: 37 times; Followed by:5 members

by MBA.Aspirant » Mon Jun 20, 2011 4:52 pm

check here: https://www.beatthegmat.com/post378217.h ... ht=#378217

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Bens4vcobra: Senior | Next Rank: 100 Posts; Posts: 76; Joined: Thu Feb 19, 2009 12:10 pm; Thanked: 3 times; Followed by:2 members

by Bens4vcobra » Tue Jun 21, 2011 6:25 am

MBA.Aspirant wrote:check here: https://www.beatthegmat.com/post378217.h ... ht=#378217

Thanks I read that. I still don't understand why it is 27 and not 81. Doesn't appear that was explained in that thread either.

"It takes no ability to give effort. Toughness is not God-given; it's a choice. The discipline to execute is a habit." - Nick Saban

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Frankenstein: Legendary Member; Posts: 1448; Joined: Tue May 17, 2011 9:55 am; Location: India; Thanked: 375 times; Followed by:53 members

by Frankenstein » Tue Jun 21, 2011 6:59 am

Bens4vcobra wrote:For all positive integers m, (m) (with a box around it) = 3m when m is odd and (m) (box around it) = 1/2m when m is even. Which is the equal to (9) X (6)? () = box

A)81
B)54
C)36
D)27
E)18

Hi,
[9]x[6] = 27*3 = [27]
The values is 81, but the options are not 81,54,36,27,18 but [81],[54],[36],[27],[18]

Hence, D

Cheers!

Things are not what they appear to be... nor are they otherwise

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jk2010: Senior | Next Rank: 100 Posts; Posts: 66; Joined: Wed Sep 29, 2010 8:41 am; Location: Washhington, DC; Thanked: 8 times

by jk2010 » Fri Jun 24, 2011 9:17 am

I had the same problem....try this explanation.

https://www.beatthegmat.com/function-pro ... tml#327607

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