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Some Q's from Set 23

This topic has 1 expert reply and 2 member replies
zaffar Senior | Next Rank: 100 Posts Default Avatar
Joined
29 Dec 2006
Posted:
49 messages

Some Q's from Set 23

Post Wed Apr 18, 2007 4:04 am
Hi,
can somebody explain it to me
Thanx in advance.

A certain company assigns employees to offices in such a way that some of the offices
can be empty and more than one employee can be assigned to an office. In how many
ways can the company assign 3 employees to 2 different offices?
A. 5
B. 6
C. 7
D. 8
E. 9

------------------------------------------------------------
The infinite sequence a1, a2,, an, is such that a1 = 2, a2 = -3, a3 = 5, a4 = -1, and an =
an-4 for n > 4. What is the sum of the first 97 terms of the sequence?
A. 72
B. 74
C. 75
D. 78
E. 80

and can somebody also give some link for basics of sequences.

---------------------------------------------------------------
Which of the following fractions has a decimal equivalent that is a terminating decimal?
A.
189
10
B.
196
15
C.
225
16
D.
144
25
E.
128

-----------------------------------------------------------------

Company S produces two kinds of stereos: basic and deluxe. Of the stereos produced by
Company S last month,
3
2
were basic and the rest were deluxe. If it takes
5
7
as many
hours to produce a deluxe stereo as it does to produce a basic stereo, then the number of
hours it took to produce the deluxe stereos last month was what fraction of the total
number of hours it took to produce all the stereos?
6
A.
17
7
B.
31
14
C.
15
7
D.
35
17
E.
2
1

--------------------------------------------------------------------------

Leo can buy a certain computer for p1 dollars in State A, where the sales tax is t1 percent,
or he can buy the same computer for p2 dollars in State B, where the sales tax is t2
percent. Is the total cost of the computer greater in State A than in State B?
10
(1) t1 > t2
(2) p1t1 > p2t2

-----------------------------------------------------------

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mendiratta Junior | Next Rank: 30 Posts Default Avatar
Joined
08 May 2007
Posted:
26 messages
Upvotes:
1
Post Tue May 08, 2007 9:27 pm
momentary_lapse wrote:
1) 4 ways (options are 0,3 and 1,2 and 2,1 and 3,0)
2) 74 ( a1+a2+a3+a4 = a5+a6+a7+a8 = 3. there are 24 such sets in 97 and an additonal a1 = 24*3 + 2 = 74
3) cant quite unedrstand the question which is the fraction . Where is the --
4) i dont get the fractions properly . Can you put a / to signify the fractions?
5) E
1. I think answer should be 8. Here we're talking about 3 different person. Lets suppose they are A, B & C.
So different seating arrangements can be :-
ABC 0
AB C
AC B
BC A
A BC
B AC
C AB
0 ABC

2. Perfect explanation.
3.4 - NOt clear
5. Agree on E. because stmt A says about tax rate and Stmt B says abt tax that he has to pay. So answer is not possible.

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momentary_lapse Senior | Next Rank: 100 Posts Default Avatar
Joined
26 Feb 2007
Posted:
43 messages
Post Tue May 08, 2007 1:30 pm
1) 4 ways (options are 0,3 and 1,2 and 2,1 and 3,0)
2) 74 ( a1+a2+a3+a4 = a5+a6+a7+a8 = 3. there are 24 such sets in 97 and an additonal a1 = 24*3 + 2 = 74
3) cant quite unedrstand the question which is the fraction . Where is the --
4) i dont get the fractions properly . Can you put a / to signify the fractions?
5) E

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GMAT/MBA Expert

Stacey Koprince GMAT Instructor
Joined
27 Dec 2006
Posted:
2228 messages
Followed by:
681 members
Upvotes:
639
GMAT Score:
780
Post Mon Apr 30, 2007 1:01 pm
Hi, Zaffar

You probably haven't gotten any replies yet b/c people feel overwhelmed when they see a ton of questions in one post! You'll get a better response if you start a separate thread for each question.

Also, you say these questions are from "set 23" - can you be more specific about the source? I don't recognize "set 23" - and we do need you to post sources for the questions you post.
Thanks!

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