Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 06 May 2015, 21:28

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Gmat club test

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Senior Manager
Joined: 08 Jan 2009
Posts: 329
Followers: 2

Kudos [?]: 88 [0], given: 5

Gmat club test [#permalink]  06 Sep 2009, 20:45
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 3 sessions

In the morning, John drove to his mother's house in the village at an average speed of 60 kmh. When he was going back to town in the evening, he drove more cautiously and his speed was lower. If John went the same distance in the evening as in the morning, what was John's average speed for the entire trip?

1.In the evening, John drove at a constant speed of 40 kmh.
2.John's morning drive lasted 2 hours.

[Reveal] Spoiler:
A

If A ,B and C are points on the plane, is AB<10 ?

1. AC +BC =10
2. AB + AC > 10

[Reveal] Spoiler:
E

How much water (in grams) should be added to a 35%-solution of acid to obtain a 10%-solution?
1.There are 50 grams of the 35%-solution.
2.In the 35%-solution the ratio of acid to water is 7:13.

[Reveal] Spoiler:
A
Senior Manager
Joined: 23 Jun 2009
Posts: 355
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Followers: 5

Kudos [?]: 96 [0], given: 63

Re: Gmat club test [#permalink]  07 Sep 2009, 02:26
Problem-1
1) sufficient. x= distance. x/60 = time that needed for morning trip, x/40= time needed for evening trip
mean speed is 2x/(x/60+x/40)=2x/(5x/120) = 48
2)insuff. we do not know the evening speed.
A

Problem-2
1)insuff.
If a and b are in the same side of c then answer is yes. But if they are not on the same side then answer becomes no.
2)insuff. say a=1, b=2 and c=11 on a number line. This equation holds and ab<10. But say a=1, b=20, c=30 equation still holds. But ab>10.
together insuff
we know ac+bc=10 from 1. We know ac+ab>10 from 2. That means bc<ab. That means c is closer to b than a. But we still do not know whether they are on the same side or not. Look at examples.
a=1, b=9, c=10 =>ab+ac>10; ac+bc=10 and ab<10
a=1, b=11, c=10 => ab+ac>10; ac+bc=10 and ab=10
E

problem-3
1)suff. 50 gram %35 means => 17,5 grams of acid and 32,5 grams of water. If we put 125 grams of water. We got a %10 percent mixture.
2)insuff. it is not a data. it is a reality. %35/%65=7/13 :D
A
Senior Manager
Joined: 08 Jan 2009
Posts: 329
Followers: 2

Kudos [?]: 88 [0], given: 5

Re: Gmat club test [#permalink]  07 Sep 2009, 17:36
Just wanted to confirm.

For Question 1 :

Could you please confirm whether my below point is correct

The given 60 kmh is the average speed for the whole morning trip ( towards + back). So we are not worried about whether his speed reduced during the return journery.
Senior Manager
Joined: 23 Jun 2009
Posts: 355
Location: Turkey
Schools: UPenn, UMich, HKS, UCB, Chicago
Followers: 5

Kudos [?]: 96 [0], given: 63

Re: Gmat club test [#permalink]  08 Sep 2009, 00:11
tkarthi4u wrote:
Just wanted to confirm.

For Question 1 :

Could you please confirm whether my below point is correct

The given 60 kmh is the average speed for the whole morning trip ( towards + back). So we are not worried about whether his speed reduced during the return journery.

No. 60 is only for towards trip. Backward trip is in the evening.
Re: Gmat club test   [#permalink] 08 Sep 2009, 00:11
Similar topics Replies Last post
Similar
Topics:
GMAT CLub Tests Quants 1 11 May 2009, 04:51
10 GMAT Club Tests 48 23 Oct 2008, 03:51
GMAT Club Test 25 1 23 May 2008, 10:00
GMAT Club Tests (Difficulty)....? 6 29 Mar 2008, 13:39
gmat club tests 7 27 Jan 2008, 10:44
Display posts from previous: Sort by

Gmat club test

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.