• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• Reach higher with Artificial Intelligence. Guaranteed
Now free for 30 days

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

## GMATPrep - Practice Test #1 - Problem Solving - Need Help

This topic has 7 member replies
dominate11 Newbie | Next Rank: 10 Posts
Joined
10 Jan 2007
Posted:
4 messages

#### GMATPrep - Practice Test #1 - Problem Solving - Need Help

Wed Feb 28, 2007 7:19 am

1. 2^(4-1)^2 / 2^(3-2) = ?

3. For all positive integers m, = 3m when m is odd and = .5m when m is even. Which of the following is equivalent to <9> X <6> ?

11. In n is a postive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n? 1) 10 2) 11 3) 12 4) 13 5) 14

I appreciate any guidance...

Neo2000 Legendary Member
Joined
27 Jan 2007
Posted:
519 messages
31
Test Date:
30/09
Target GMAT Score:
710
Wed Mar 07, 2007 8:01 am
gabriel wrote:
[
Nope..... neo has got it right... the only thing wrong with his answer is that 2^8 = 256... not 64
whatcha talking about?? i did write 2^8 = 256

anuroopa Junior | Next Rank: 30 Posts
Joined
30 Sep 2006
Posted:
16 messages
1
Wed Mar 07, 2007 8:46 am
thnks neo - I understood the q wrong

Neo2000 Legendary Member
Joined
27 Jan 2007
Posted:
519 messages
31
Test Date:
30/09
Target GMAT Score:
710
Wed Feb 28, 2007 9:03 am
For 1
2 ^(3)^2 = 2^9/2 = 2^8 = 256

dominate11 wrote:
3. For all positive integers m, = 3m when m is odd and = .5m when m is even. Which of the following is equivalent to <9> X <6> ?
<9> implies that m is odd => <9> = 3(9) = 27
Similarly for <6> = (.5)6 = 3

So finally you get 27 X 3 = 81

Last edited by Neo2000 on Wed Mar 07, 2007 8:00 am; edited 1 time in total

gabriel Legendary Member
Joined
20 Dec 2006
Posted:
986 messages
Followed by:
1 members
51
Fri Mar 02, 2007 8:24 am
dominate11 wrote:

1. 2^(4-1)^2 / 2^(3-2) = ?

3. For all positive integers m, = 3m when m is odd and = .5m when m is even. Which of the following is equivalent to <9> X <6> ?

11. In n is a postive integer and the product of all the integers from 1 to n, inclusive, is a multiple of 990, what is the least possible value of n? 1) 10 2) 11 3) 12 4) 13 5) 14

I appreciate any guidance...
ok so the first has been answered by neo.. so let me get to the other two

3.) since = 3m when m is odd ... therefore < 9> = 3*9 since 9 is odd... also = 0.5*m when m is even ... therefore <6>=.5*6 since 6 is even... therefore the answer to <9> X <6> = 27*3=81.... btw i am assuming that X means the multiplication..

11.) okay 990= 9*11*10... therefore from 1 to n we need to have 9,10 and 11 and the least value for such a n is 11.... because the sequence of numbers from 1 to 11 includes all the three no ...

2 more questions in the same league that should help u understand the concept better... find the least n such that the product of numbers from 1 to n is a multiple of 350..... also find the least n such that the product from 1 to n is a multiple of 455... try solving them and let me know if u dont get it ...

anuroopa Junior | Next Rank: 30 Posts
Joined
30 Sep 2006
Posted:
16 messages
1
Wed Mar 07, 2007 4:01 am
Hi
I am not sure if Neo's answer is right - according to the exponent rule- (x^y)^z = x^zy

So,
so it should be 2^6 - 2^1= 2^5

Neo, could you elaborate on ho u got ur answer

Neo2000 Legendary Member
Joined
27 Jan 2007
Posted:
519 messages
31
Test Date:
30/09
Target GMAT Score:
710
Wed Mar 07, 2007 7:33 am
anuroopa wrote:
Hi
I am not sure if Neo's answer is right - according to the exponent rule- (x^y)^z = x^zy
While this is correct, what the question is asking for is x^(y)^z which is how i got the answer.

Hope this helps. If not, do let me know

gabriel Legendary Member
Joined
20 Dec 2006
Posted:
986 messages
Followed by:
1 members
51
Wed Mar 07, 2007 7:58 am
anuroopa wrote:
Hi
I am not sure if Neo's answer is right - according to the exponent rule- (x^y)^z = x^zy

So,
so it should be 2^6 - 2^1= 2^5

Neo, could you elaborate on ho u got ur answer
Nope..... neo has got it right... the only thing wrong with his answer is that 2^8 = 256... not 64

### Best Conversation Starters

1 lheiannie07 80 topics
2 LUANDATO 62 topics
3 ardz24 52 topics
4 AAPL 47 topics
5 Roland2rule 43 topics
See More Top Beat The GMAT Members...

### Most Active Experts

1 Jeff@TargetTestPrep

Target Test Prep

134 posts
2 Brent@GMATPrepNow

GMAT Prep Now Teacher

131 posts
3 GMATGuruNY

The Princeton Review Teacher

130 posts
4 Rich.C@EMPOWERgma...

EMPOWERgmat

128 posts
5 Scott@TargetTestPrep

Target Test Prep

110 posts
See More Top Beat The GMAT Experts