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Data Sufficiency Query for 6 Questions

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Data Sufficiency Query for 6 Questions [#permalink] New post 19 Jul 2009, 18:31
00:00
A
B
C
D
E

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(N/A)

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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Hi All,

PFA the document having all the six questions for DS. Please provide the answer for them so that i can understand the logic for calculation.

Thanks in Advance.

Regards,
Aban
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 03:49
for Q1.I got C as the ans.What is the OA?

Taking both stmnts into account you can get m*p as 30*2
i.e mp=60 or 2*2*3*5

since 2<m<p two possible values are m=4 and p=15
or m=6 and p=10
in both cases p/m will yield r as >1.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 04:42
Hi my first post in the fforum...
let's go for question 2

if v and w are differents integers, does v=0?
1) vw=v²
2)w=2

E.

1) is insuf since we could have w=v=1, or v=0 and w = whatever.
2) is insuf. we know nothing about v

the two togheter are still insuf. w=2 ==> 2v=v² ==> v=0 or v=2

Hope i'm not wrong.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 06:16
For this one I would have picked D (each stmnt suff)

At least, i know that (1) is suff.
if 2 is a factor of m and p it means that m and P are even. we could never have p=m+1. and since m is not a factor of p, the reminder is at least 2.

I don't have a claer explanation why (2) also is sufficient.

what's the OA?


shrutisingh wrote:
for Q1.I got C as the ans.What is the OA?

Taking both stmnts into account you can get m*p as 30*2
i.e mp=60 or 2*2*3*5

since 2<m<p two possible values are m=4 and p=15
or m=6 and p=10
in both cases p/m will yield r as >1.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 08:32
The answer to Question 1 is 'D'.

GCF of m & p is 2. m < p and m is not a factor of p. Tried with numbers I couldnt find a pair whose remiander is < 2
and also remainder when a number is divided by another is always the HCF of two numbers so 1 is SUFF

Second statement is SUFF which is = 1 in all possible cases, (unless i am missing any particular scenario)
LCM is 30 possible numbers are
(3,10) remainder 1
(5,6) remainder 1

***********************

The answer to Question 2 is 'C'

vw -v^2 = 0
v(w-v) = 0
v= 0 (or) w=v
donno for sure if v= 0 , NOT SUFF

w=2, NOT SUFF

put together , w=2 & w=v, hence v= 2. SUFF to tell that V <> 0

***********************************

The answer to Question 3 is 'C'

is x+ y < 1, both statements are clearly insuff, and then toghether we should be able to tell that the sum is always less than 1.

please confirm this!

*********************************

The answer to Question 4 is 'C'

A :NOT SUFF, Two of the interior anlges are right angles : that leaves us with sum of rest of angles is 180, clearly not enuf to say if one angle is 60 or not
B : Not SUFF, if one angle is x and the other angle is 2x, all i am able to deduce is 3x = 360 -(A+D)

from 1 & 2 clearly
3x = 360-(A+D)
3x= 180
x=60 SUFF

***********************************

The answers to Question 5,6 is 'E'. [will explain if some one raised it.]

*********************************
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 10:25
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hey pareekpuneet,

could you give OA for Q2 please?
I still think best answer is E......

to skpMatcha,
Quote:
put together , w=2 & w=v, hence v= 2. SUFF to tell that V <> 0

here I would have said "w=2 & (v=w or v=0), hence v=0 or v=2 NOT SUFF.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 10:39
Good catch !

Quote:
here I would have said "w=2 & (v=w or v=0), hence v=0 or v=2 NOT SUFF.


but given in the question that v & w are different integers which will rule out V=2

leaving us with v = 0. My answer is correct but not approach.

Thanks for correcting! The answer is still 'C'
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 10:42
Just after I posted to you, it struck me as a lightening that the answer is infact 'A' :)

yes !
Quote:
vw -v^2 = 0
v(w-v) = 0
v= 0 (or) w=v


Here w cannot be V , as given in the stem w & v are differnet integers so we cna say that v= 0.

so answer is 'A'.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 12:53
Guys ... for the vq question .. answer is A ... I dont know how we can get to know by using the first statement if v can be zero or not.

Let me list down the answers for all questions here:

1. Question 1 : Answer is A
2. Question 2: Answer is A
3. Question 3 : Answer is E
4. Question 4: Answer is E.
5. Question 5: Answer is A
6. Question 6: Answer is B.

Please help me for all of them. Thanks in advance.

Regards,
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 12:57
Hey skpMatcha ,

Your logic for vw question looks fine to me .. since v cannot be equal to w it has to be zero ..solving the above eqthn...perfect...v(w-v) = 0. what about the rest ones?

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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 13:40
Oh skpMatcha, you're right for Q2, answer A is fine.....

for Q3

x+y<1?

1) x<8/9
2) y<1/8

the stmnts alone are not suff. we want to figure out what happens when put together.
8/9=0.88888888888.......
1/8=0.125

picking numbers:
x=0; y = 0 the answer to the question is YES
x=0.881 (<0.88888...) and y =0.121 x+y = 1.002 the answer to the question is NO

hence, the two are not SUFF.... answer E.

Are we allows to use decimals as I did?
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 18:29
Hello everyone. Nice to meet you all.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 18:30
Hello everyone. Nice to meet you all.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 20 Jul 2009, 18:30
Hello everyone. Nice to meet you all.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 21 Jul 2009, 03:17
madeinafrica wrote:
Oh skpMatcha, you're right for Q2, answer A is fine.....

for Q3

x+y<1?

1) x<8/9
2) y<1/8

the stmnts alone are not suff. we want to figure out what happens when put together.
8/9=0.88888888888.......
1/8=0.125

picking numbers:
x=0; y = 0 the answer to the question is YES
x=0.881 (<0.88888...) and y =0.121 x+y = 1.002 the answer to the question is NO

hence, the two are not SUFF.... answer E.

Are we allows to use decimals as I did?



Yes you can use the decimals.
E is the correct ans
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 21 Jul 2009, 03:32
for Q4

consider stmnt 1:Even if two angles are given as 90 you are not sure about the measure of the remaining angles.Thus 1 is insufficient.

stmnt 2:two of the angles are given.Not sure about the remaining two.Thus 2 is insufficient.

If you combine 1 and 2,you dont know whether they would be the 4 angles separately or both stmnts are taking any angle as common.

Thus E.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 21 Jul 2009, 03:35
for Q5:

If you represent each area with digits,and make equations you will realise that A is sufficient to find the common area
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 21 Jul 2009, 03:45
Quote:
for Q4

consider stmnt 1:Even if two angles are given as 90 you are not sure about the measure of the remaining angles.Thus 1 is insufficient.

stmnt 2:two of the angles are given.Not sure about the remaining two.Thus 2 is insufficient.

If you combine 1 and 2,you dont know whether they would be the 4 angles separately or both stmnts are taking any angle as common.

Thus E.


hey I have a doubt! clearly A & B are insuff on their own.

combine them together. if two angles are given as 90, and second statement says one angle is double the other. They cant be common angles, because if one is 90(x) and other is 180 (2x), then the 4th angle with be 0.

so it has to be 90 + 90 + x+ 2x = 360
then x will be 60.

Please correct me if im wrong.
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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 21 Jul 2009, 20:40
pareekpuneet wrote:
Hi All,

PFA the document having all the six questions for DS. Please provide the answer for them so that i can understand the logic for calculation.

Thanks in Advance.

Regards,
Aban


pareekpuneet,

Thats not the way to post your questions/problems. If you post in such a way, you wont get the detail explanations and sufficient replies to your questions.

The best way is to post the question individually. If so, you will get many replies and detail disection of your question'.

Also it is not gmat club etiquette to post a buch of questions in a word file. If you are new to the forum, refer to the following link for how to post your questions and revele the OA/OE: etiquette-for-forum-participation-59508.html

Hope you understand my point.
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Verbal: new-to-the-verbal-forum-please-read-this-first-77546.html
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Gmat: everything-you-need-to-prepare-for-the-gmat-revised-77983.html


GT

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Re: Data Sufficiency Query for 6 Questions [#permalink] New post 22 Jul 2009, 01:30
skpMatcha wrote:
Quote:
for Q4

consider stmnt 1:Even if two angles are given as 90 you are not sure about the measure of the remaining angles.Thus 1 is insufficient.

stmnt 2:two of the angles are given.Not sure about the remaining two.Thus 2 is insufficient.

If you combine 1 and 2,you dont know whether they would be the 4 angles separately or both stmnts are taking any angle as common.

Thus E.


hey I have a doubt! clearly A & B are insuff on their own.

combine them together. if two angles are given as 90, and second statement says one angle is double the other. They cant be common angles, because if one is 90(x) and other is 180 (2x), then the 4th angle with be 0.

so it has to be 90 + 90 + x+ 2x = 360
then x will be 60.

Please correct me if im wrong.



You have mentioned two of the three cases.
The third case can be as below
say angle DAB=90 ABC=90,
thus angle BCD=45 and angle CDA=135

Thus E
Re: Data Sufficiency Query for 6 Questions   [#permalink] 22 Jul 2009, 01:30
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