Search found 11 matches
looks like the answers given don't add up, so i'm guessing the publisher made the mistake here. thanks
- by light_speed
Fri Nov 21, 2008 2:29 pm- Forum: Problem Solving
- Topic: simultaneous equations
- Replies: 4
- Views: 1569
- by light_speed
Fri Nov 21, 2008 2:09 pm- Forum: Problem Solving
- Topic: Find the Value Question
- Replies: 10
- Views: 1952
- by light_speed
Fri Nov 21, 2008 2:08 pm- Forum: Problem Solving
- Topic: Find the Value Question
- Replies: 10
- Views: 1952
simultaneous equations
. At a certain diner, a hamburger and coleslaw cost $3.59, and a hamburger and french fries cost $4.40. If french fries cost twice as much as coleslaw, how much do french fries cost? (A) $0.30 (B) $0.45 (C) $0.60 (D) $0.75 (E) $0.90 official answer is E but can't figure the answer out. My equations ...
- by light_speed
Fri Nov 21, 2008 2:07 pm- Forum: Problem Solving
- Topic: simultaneous equations
- Replies: 4
- Views: 1569
Find the Value Question
15. n= 2.3.5.7.9.11.13/77k . = multiply If n is an integer and then which of the following could be the value of k? (A) 22 (B) 26 (C) 35 (D) 54 (E) 60 I tried breaking down 77 into its primes (7 x 11) and canceled the identical numbers from the numerator and denominator but got stuck after that. Ans...
- by light_speed
Fri Nov 21, 2008 1:51 pm- Forum: Problem Solving
- Topic: Find the Value Question
- Replies: 10
- Views: 1952
Ratios
A certain company that sells only cars and trucks reported that revenues from car sales in 1997 were down 11 percent from 1996 and revenues from truck sales in 1997 were up 7 percent from 1996. If total revenues from car sales and truck sales in 1997 were up 1 percent from 1996, what is the ratio of...
- by light_speed
Sun Jul 27, 2008 4:11 pm- Forum: Problem Solving
- Topic: Ratios
- Replies: 2
- Views: 1366
Daily GMAT question site
My hard drive crashed on me and I lost some data, one of them was a bookmark to this site that used to have weekly/daily practice questions for verbal and especially quant. The last question was on something like June 14th and was a time question ( 2 pipes working, how long would it take to fill up?...
- by light_speed
Mon Jul 14, 2008 12:45 pm- Forum: GMAT Math
- Topic: Daily GMAT question site
- Replies: 2
- Views: 4174
Algebra
If x and y are positive, is x^3> y? (1)sqrt x> y (2) x > y The answer is showing as E, none, . I selected D My logic:- For the first option, if you square root a number, it becomes smaller, hence if the square root of x is larger than y, does that not mean x >y? If x>y, and is positive, should not x...
- by light_speed
Wed Apr 09, 2008 3:50 pm- Forum: Data Sufficiency
- Topic: Algebra
- Replies: 4
- Views: 1765
Algebra/Probability
If an integer n is to be chosen at random from the integers 1 to 96, inclusive, what is the probability that n(n + 1)(n + 2) will be divisible by 8? A.1/4 B.3/8 C.1/2 D.5/8 E.3/4 I have calculated that there are 57 numbers that are divisible by 8 from the above forumula, but dividing 57/96 to give m...
- by light_speed
Wed Apr 09, 2008 9:56 am- Forum: Problem Solving
- Topic: Algebra/Probability
- Replies: 3
- Views: 1648
Counting Problems
if n=8^11 -8, what is the units digit of n? A 0 B 1 C 4 D 6 E 8 Ans: C In the sequence 1,2,4,8,16,32...each term after the first is twice the previous term. What is the sum of the 16th,17th and 18th term in the sequence? A. 2^18 B. 3(2^17) C. 7(2^16) D. 3(2^16) E. 7(2^15) Ans:E If 10^50 -74 is writt...
- by light_speed
Sat Mar 01, 2008 7:57 am- Forum: Problem Solving
- Topic: Counting Problems
- Replies: 6
- Views: 8691
Counting Question
The infinite sequence a1, a2,…, an,… is such that a1 = 2, a2 = -3, a3 = 5, a4 = -1, and an = a n-4 (subscript, comes at the bottom) for n > 4. What is the sum of the first 97 terms of the sequence?
A. 72
B. 74
C. 75
D. 78
E. 80
- by light_speed
Sun Feb 24, 2008 7:36 pm- Forum: Problem Solving
- Topic: Counting Question
- Replies: 2
- Views: 1473