It is currently 27 Jun 2017, 16:13

### 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

# David says to robert "if you guve me 15 of your tiles,

Author Message
TAGS:

### Hide Tags

Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
David says to robert "if you guve me 15 of your tiles, [#permalink]

### Show Tags

18 Apr 2013, 01:05
David says to robert "if you guve me 15 of your tiles, i will have three times the number of tiles left with you robert replies if you give me 15 of your tiles i will have the same no of tiles left with you find the no of tiles of robert

a.75
b.60
c.45
d.30
e.25

Last edited by Zarrolou on 18 Apr 2013, 03:49, edited 1 time in total.
Modified OA
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
the ratio of incomes of hila and kime is 9:7 and the ratio o [#permalink]

### Show Tags

18 Apr 2013, 01:09
the ratio of incomes of hila and kime is 9:7 and the ratio of expenses is 4:3 if each of them saves 200$per month find monthly income of kime a.1200$
b.1400$c.1600$
d.1800$e.2000$

[Reveal] Spoiler: OA
B

Last edited by Zarrolou on 18 Apr 2013, 03:50, edited 1 time in total.
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
4men and 6 boys can finish a piece of work in 20 days while [#permalink]

### Show Tags

18 Apr 2013, 01:11
4men and 6 boys can finish a piece of work in 20 days while 3 men and 4 boys can finish it in 28 days find the time taken by 7 men to finish the work

a.20 days
b.40 days
c.140 days
d.280 days
e. cant find

[Reveal] Spoiler: OA
A

Last edited by Zarrolou on 18 Apr 2013, 03:50, edited 1 time in total.
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
students of class are made to stand in row if one student is [#permalink]

### Show Tags

18 Apr 2013, 01:14
students of class are made to stand in row if one student is extra in a row there would be 2 rows less if one student is less in row there would be 3 rows more find the no of student

a.120
b.90
c.60
d.30
e.cant find

[Reveal] Spoiler: OA
C

Last edited by Zarrolou on 19 Apr 2013, 08:18, edited 1 time in total.
VP
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1122
Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Re: David says to robert "if you guve me 15 of your tiles, [#permalink]

### Show Tags

18 Apr 2013, 01:19
2
KUDOS
R = titles of Robert
D = titles of David
$$3*(R-15)=D+15$$
$$D-15=R+15$$

You solve this and obtain $$R=45$$ and $$D=75$$, it's not B and here we can see why:

b.$$R=60$$ so $$3*(60-15)=D+15$$ $$D=120$$, then the second equation doesn't "work"
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

VP
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1122
Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Re: the ratio of incomes of hila and kime is 9:7 and the ratio o [#permalink]

### Show Tags

18 Apr 2013, 01:38
Salary = exp + savings

$$\frac{eH+sH}{eK+sK}=\frac{9}{7}$$ saving are 200$$$\frac{eH+200}{eK+200}=\frac{9}{7}$$ $$\frac{eH}{eK}=\frac{4}{3}$$ $$7(eH+200)=9(eK+200)$$ $$7eH-9eK=400$$ $$3eH=4eK$$ do some math... eH=1600 and eK=1200 $$SalaryKime = 1200+200 = 1400$$$ B and not C...
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

VP
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1122
Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Re: 4men and 6 boys can finish a piece of work in 20 days while [#permalink]

### Show Tags

18 Apr 2013, 02:00
M = rate of work of men
b = rate of work of boys

$$(4M+6B)*20 days= 1 job$$
$$(3M+4B)*28 = 1 job$$

$$80M+120B=1$$
$$84M+112B=1$$ so dome math...

$$M=\frac{1}{140}$$
$$B=\frac{1}{280}$$ those are the rate of work (each hour).

$$7 boys = 7*\frac{1}{128}=\frac{7}{128}$$ each hour
To complete one job 1 $$job = time*\frac{7}{280}$$ now this time is $$\frac{280}{7}$$ hour that is none of your answers
If the question were about men
$$7 men = 7*\frac{1}{140}=\frac{7}{140}$$
To complete one job 1 $$job = time*\frac{7}{140}$$ now this time is $$\frac{140}{7}$$ = 20 A
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

Manager
Status: Never ever give up on yourself.Period.
Joined: 23 Aug 2012
Posts: 152
Location: India
Concentration: Finance, Human Resources
GMAT 1: 570 Q47 V21
GMAT 2: 690 Q50 V33
GPA: 3.5
WE: Information Technology (Investment Banking)
Re: students of class are made to stand in row if one student is [#permalink]

### Show Tags

18 Apr 2013, 02:01
IMO C
lets put that in equation.
No. of students in one row=x
No. of rows=y
Total students=xy.
1st equation:
(x+1)(y-2)=xy i.e. xy-2x+y-2 =xy i.e. -2x+y=2
2nd Equation
(x-1)(y+3)=xy i.e. xy+3x-y-3 =xy i.e. 3x-y=3

adding 1st and second equation we get x=5
putting x=5 in any of the equation we get y=12

so total number of Students should be xy = 5*12 = 60

R u sure OA is D?
_________________

Don't give up on yourself ever. Period.
Beat it, no one wants to be defeated (My journey from 570 to 690) : http://gmatclub.com/forum/beat-it-no-one-wants-to-be-defeated-journey-570-to-149968.html

Current Student
Joined: 24 Nov 2012
Posts: 176
Concentration: Sustainability, Entrepreneurship
GMAT 1: 770 Q50 V44
WE: Business Development (Internet and New Media)
Re: David says to robert "if you guve me 15 of your tiles, [#permalink]

### Show Tags

18 Apr 2013, 02:37
robert has 45 tiles.. agree with zar
_________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

http://www.manhattangmat.com/blog/index.php/author/cbermanmanhattanprep-com/ - This is worth its weight in gold

Economist GMAT Test - 730, Q50, V41 Aug 9th, 2013
Manhattan GMAT Test - 670, Q45, V36 Aug 11th, 2013
Manhattan GMAT Test - 680, Q47, V36 Aug 17th, 2013
GmatPrep CAT 1 - 770, Q50, V44 Aug 24th, 2013
Manhattan GMAT Test - 690, Q45, V39 Aug 30th, 2013
Manhattan GMAT Test - 710, Q48, V39 Sep 13th, 2013
GmatPrep CAT 2 - 740, Q49, V41 Oct 6th, 2013

GMAT - 770, Q50, V44, Oct 7th, 2013
My Debrief - http://gmatclub.com/forum/from-the-ashes-thou-shall-rise-770-q-50-v-44-awa-5-ir-162299.html#p1284542

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7446
Location: Pune, India
Re: students of class are made to stand in row if one student is [#permalink]

### Show Tags

19 Apr 2013, 08:17
abhishek1990p wrote:
students of class are made to stand in row if one student is extra in a row there would be 2 rows less if one student is less in row there would be 3 rows more find the no of student

a.120
b.90
c.60
d.30
e.cant find

Think of the students standing in a matrix of rows and columns.

There are r rows and c columns. So there are a total of rc students.

Algebra approach:

Now if there is 1 student extra in each row i.e. there is one column extra, no of rows will be r-2 rows.
If there is 1 student less in each row, i.e. there is one column less, no of rows will be r+3 rows.

(r - 2)(c + 1) = rc
(r + 3)(c - 1) = rc

r - 2c = 2
-r + 3c = 3

c = 5
r = 12

Total number of students = 5*12 = 60
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 7446 Location: Pune, India Re: 4men and 6 boys can finish a piece of work in 20 days while [#permalink] ### Show Tags 19 Apr 2013, 08:27 abhishek1990p wrote: 4men and 6 boys can finish a piece of work in 20 days while 3 men and 4 boys can finish it in 28 days find the time taken by 7 men to finish the work a.20 days b.40 days c.140 days d.280 days e. cant find [Reveal] Spoiler: OA A M = rate of work of each man, B - rate of work of each boy 4M + 6B = 1/20 3M + 4B = 1/28 Solve simultaneously. We need to get rid of B so multiply first equation by 2 and the second one by 3 8M + 12B = 1/10 9M + 12B = 3/28 Subtract the equations to get: M = 2/280 = 1/140 = Rate of work of one man Rate of work of 7 Men = 7/140 = 1/20 Time taken = 1/Rate of work = 20 days _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

Veritas Prep Reviews

Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)

### Show Tags

19 Apr 2013, 12:32
There are two buses. If 10 passenger are sent from the first bus to second bus, passenger in both will be equal. If 20 passenger from 2nd bus are sent to 1st bus, the number of passenger in first will be twice the number of passenger of 2nd
Find total passenger

a.180
b.500
c.600
d.300
e100

Last edited by Zarrolou on 19 Apr 2013, 13:04, edited 3 times in total.
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
.the area of rectangle increase by 200 sqmtr if lenghth is i [#permalink]

### Show Tags

19 Apr 2013, 12:53
5.the area of rectangle increase by 200 sqmtr if lenghth is increse by 8m and breadth by 3m the area incre by 225sq m if lenght is incr by 3 m and bradth by 8m find perimeter
a.74m
b.60m
c.56m
d.48m
e.44m
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
the charges for a 5 day trip by tourisim bus for one full an [#permalink]

### Show Tags

19 Apr 2013, 12:55
6.the charges for a 5 day trip by tourisim bus for one full and half ticket is 1440 iccluding of boarding charges which are same for a full as well as a half ticket
the charges for the same trip for 2 full and one half ticket the charges are 2220the fare for half ticket is 75% of the full ticket find the difference betwn the fare and boarding charges for one full ticket
a.480
b.360
c.300
d.240
e.180
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
After covering a distance of 30 miles with a uniform speed a [#permalink]

### Show Tags

19 Apr 2013, 12:59
After covering a distance of 30 miles with a uniform speed, a train engine develops a defect and consequently its speed is reduced to 4/5th of its original speed. In result the train reaching its destination late by 3/4 hrs. Had it happened after covering 18 miles more the train would have reached its destination 9 mins earlier.
Find the distance of journey

a.75 miles
b.90 miles
c.105 miles
d.120 miles
e.135 miles

Last edited by Zarrolou on 19 Apr 2013, 15:53, edited 1 time in total.
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
Albert invested a some amount at rate of 3% per quaterly sim [#permalink]

### Show Tags

19 Apr 2013, 13:01
Albert invested a some amount at rate of 3% per quaterly simple interest and other amount at the rate of 7.5% half yearly simple interest. he received 1500$as interest for a year. if he had interchanged the amount invested he would have received 78$ more as interest for the year.
Find the smallest investment

a.7062.5$b.5762.5$
c.7562.5$d.5002.0$
e.7002.0$Last edited by Zarrolou on 19 Apr 2013, 14:13, edited 1 time in total. Edited and added OA Intern Joined: 11 Jul 2011 Posts: 19 Location: India Concentration: Entrepreneurship, Marketing GMAT Date: 03-08-2013 WE: Manufacturing and Production (Manufacturing) A man sold a strawberry juice can and pineapple juice can fo [#permalink] ### Show Tags 19 Apr 2013, 13:03 A man sold a strawberry juice can and pineapple juice can for 760$ therby making profit of 25%on strawberry juice can and 10% on pineapple juice can by selling for 767.50$he would have realized a profit of 10% on strawbeery can and 25% on pineapple can Find the cost price of pineapple juice can a.175$
b.210$c.240$
d.300$e.350$

Last edited by Zarrolou on 19 Apr 2013, 13:56, edited 1 time in total.
Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
A child on a controlled diet is fed 300 ounce of a mixture [#permalink]

### Show Tags

19 Apr 2013, 13:04
A child on a controlled diet is fed 300 ounce of a mixture of two foods a and b food a contains 10% protein and food b contains 15% protein if child diet contains exactly 38 ounce of protein daily.
How many ounce of food a are in the mixture?

a.100
b.140
c.150
d.160
e.200

Last edited by Zarrolou on 19 Apr 2013, 13:39, edited 2 times in total.
VP
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1122
Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Re: There are two buses [#permalink]

### Show Tags

19 Apr 2013, 13:04
1
KUDOS
F=first bus
S=second bud

$$F-10=S+10$$
$$2*(S-20)=F+20$$ $$2S-40=F+20$$ $$2S-F=60$$ do some annoying math

$$F=100, S=80$$

A
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

Intern
Joined: 11 Jul 2011
Posts: 19
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 03-08-2013
WE: Manufacturing and Production (Manufacturing)
.A train covered a certain distance at uniform speed [#permalink]

### Show Tags

19 Apr 2013, 13:04
11.A train covered a certain distance at uniform speed if train would have been 6miles/hour faster it would have taken 4 hrs less than the scheduled time and if the train were slower by 6 miles/hour it would have taken 6 hrs more than the scheduled time
find the distance in miles of journey
a.840
b.780
c.720
d.680
e.630
.A train covered a certain distance at uniform speed   [#permalink] 19 Apr 2013, 13:04

Go to page    1   2    Next  [ 36 posts ]

Similar topics Replies Last post
Similar
Topics:
15 Tip of the Week: The Best GMAT Study Strategy You're Probably Not Usin 3 20 Jun 2017, 00:21
4 How Well Do You Know Your Factors? 1 01 May 2016, 20:31
2 Why multiply by 1.5? 3 24 Nov 2014, 10:55
3 From MitDavidDv: Indian Vedic Mathematics 6 28 Jun 2011, 00:34
can you help me? 4 24 Jul 2013, 01:43
Display posts from previous: Sort by