BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

positive integers

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 135
Joined: Mon Oct 03, 2011 6:54 am
Followed by:4 members

positive integers

by nidhis.1408 » Thu Nov 17, 2011 11:38 am
For all positive integers m, m=3m when m is odd and m = 1/2m when m is even. Which of the following is equivalent to 9*6?

1. 81
2. 54
3. 36
4. 27
5. 18

I am just not able 2 comprehend the problem. Of course i answered it wrong!
i need some good explanation .

ps- small correction in the question
Last edited by nidhis.1408 on Thu Nov 17, 2011 11:50 am, edited 1 time in total.
Top
Source: — Problem Solving |
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 am
Thanked: 230 times
Followed by:21 members

by shankar.ashwin » Thu Nov 17, 2011 11:44 am
FOr all odd m, m =3m

Therefore, 9 = 3(9) = 27

For all even m, m = m/2

Therefore 6 = 6/2 = 3.

9*6 = 27*3 = 81 A IMO
Top
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pm
Location: New York, NY
Thanked: 13060 times
Followed by:1906 members
GMAT Score:790

by GMATGuruNY » Thu Nov 17, 2011 11:48 am
The problem has been transcribed incorrectly. Check here:

https://www.beatthegmat.com/ps-algebra-t80397.html
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Post new topic Post Reply
• Page 1 of 1