Search found 10 matches


I think so.... thanks for your confirmation Brent!

by joanjgonzalez

Wed Dec 17, 2008 9:15 am
Forum: Data Sufficiency
Topic: is something wrong????
Replies: 4
Views: 1342

is something wrong????

Is x<=3?

(1) 6x<=24
(2) 3x+1>=12

Imo is d while i would say is b

Its an easy one (I think), I do not understand...! Is there a mistake (source: online exam gmatbarcelona.com ...)

thanks!

by joanjgonzalez

Wed Dec 17, 2008 9:08 am
Forum: Data Sufficiency
Topic: is something wrong????
Replies: 4
Views: 1342

taxi ride

Hey guys, can anybody help me with this one? The cost of a taxi ride is $1.20 for the first quarter mile and $0.40 for each succeding quarter mile. What is the cost in dollars for a taxi ride of m miles? a. 1.20+1.60m b. 0.80+1.60m c. 0.80+0.40m d. 1.60m-0.40 e. 1.60m-1.20 IMO is [spoiler]b Thanks![...

by joanjgonzalez

Wed Dec 17, 2008 8:41 am
Forum: Problem Solving
Topic: taxi ride
Replies: 6
Views: 2893

2x – y = 11

then

2x = 11+y
4x = 22+2y

substituting in the equation:

4x+y --> 22+2y+y --> 22+3y

therefore whe should check if -22 + result given in each answer is divisible by 3 (so as to get an integer for y)

a. y=-27 Ok
b. y= -21 Ok
c. y= -9 Ok
d. y= -5 No Ok
e. y = -33 OK

Therefore D

by joanjgonzalez

Tue Dec 16, 2008 8:17 am
Forum: Problem Solving
Topic: Enjoy
Replies: 3
Views: 1580

tough sequences

for an infinite sequence of numbers a1, a2, a3,....an for all n>1 a(n) = a(n-1)+4 if n is odd and a(n)=a(n-1)-1 if n is even. What is the value of a(1) if a(34)=68?

a. 10
b. 11
c. 12
d. 13
e. 21

imo is [spoiler]e

thanks!!!!
[/spoiler]

by joanjgonzalez

Tue Dec 16, 2008 8:05 am
Forum: Problem Solving
Topic: tough sequences
Replies: 2
Views: 1860

Absolutely amazing!

Thanks!

by joanjgonzalez

Tue Dec 16, 2008 7:24 am
Forum: Data Sufficiency
Topic: DS - integers + absolute value
Replies: 9
Views: 1776

powers

can anybody help on this one?

if the units digit of n^33 is 7, which of the following could be tha value of n?

I. n= 41
II. n= 43
III. n= 47

a. Only I
b.. Only II
c. Only III
d. I and II
e. II and III

Imo is c

by joanjgonzalez

Tue Dec 16, 2008 7:13 am
Forum: Problem Solving
Topic: powers
Replies: 3
Views: 1470

DS - integers + absolute value

Is x an integer?

1. |x+2| = |x-3|
2. x>0

answer is [spoiler]A

Thanks![/spoiler]

by joanjgonzalez

Tue Dec 16, 2008 7:03 am
Forum: Data Sufficiency
Topic: DS - integers + absolute value
Replies: 9
Views: 1776

Hi Jimmiejaz, I would say the correct approach is #1. In you 2nd approach you are mixing 100 gallons of M solution with no gallons (zero in your formula) of N mixture. Therefore, you obtain 35% solution. Note that this percentage corresponds to the percentage of the first solution and that that is o...

by joanjgonzalez

Mon Nov 24, 2008 5:59 am
Forum: Problem Solving
Topic: Different approaches to a problem
Replies: 3
Views: 1102

Probability & integers problem

Hello everybody, Could someone help me with this problem? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Two integers fom 1 to 16 are chosen at random and their corresponding square in the above grid is shaded. What is the probability that these two shaded squares form a rectangle? a. 1/10 b. 1/8 c. 1/6 d. ...

by joanjgonzalez

Fri Nov 21, 2008 7:13 am
Forum: Problem Solving
Topic: Probability & integers problem
Replies: 0
Views: 813