Search found 10 matches
- 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
- 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