Search found 35 matches
- by SaraLotfy
Sat Oct 12, 2013 4:18 am- Forum: Problem Solving
- Topic: GMAT PREP Question (Population)
- Replies: 23
- Views: 11595
- by SaraLotfy
Sat Oct 12, 2013 3:51 am- Forum: Data Sufficiency
- Topic: Fraction - percent
- Replies: 2
- Views: 1274
- by SaraLotfy
Sat Oct 12, 2013 3:27 am- Forum: Data Sufficiency
- Topic: DS Question
- Replies: 5
- Views: 2526
- by SaraLotfy
Wed Oct 09, 2013 8:31 am- Forum: Problem Solving
- Topic: Calculator
- Replies: 2
- Views: 1812
Computer price
The average computer price today is $700. If the average computer price 3 years ago was 80% of the price today, what was the percentage increase in the average computer price over the past 3 years?
A)15%
B)20%
C)25%
D)50%
E)80%
- by SaraLotfy
Wed Oct 09, 2013 8:20 am- Forum: Problem Solving
- Topic: Computer price
- Replies: 3
- Views: 2959
Approximation - easy
Which of the following values is closest to 1/3 + 0.4 + 65%
A)1.1
B)1.2
C)1.3
D)1.4
E)1.5
- by SaraLotfy
Wed Oct 09, 2013 7:41 am- Forum: Problem Solving
- Topic: Approximation - easy
- Replies: 1
- Views: 3085
- by SaraLotfy
Tue Oct 08, 2013 5:47 am- Forum: Data Sufficiency
- Topic: French or German
- Replies: 6
- Views: 3566
- by SaraLotfy
Tue Oct 08, 2013 4:38 am- Forum: Data Sufficiency
- Topic: French or German
- Replies: 6
- Views: 3566
theCodeToGMAT wrote:Total time = AB/(A+B)
A = √8 + √9 = 2√2 + 3
B = √7 + √8 = √7 + 2√2
So, (2√2 + 3)(√7 + 2√2)/(2√2 + 3 + √7 + 2√2)
Why do you use this equation for time -----> Total time = AB/(A+B)
when the question specifies another equation
- by SaraLotfy
Wed Oct 02, 2013 10:00 am- Forum: Problem Solving
- Topic: Time formula - no answer choices
- Replies: 6
- Views: 2744
Hmmm I kinda understood the question differently. Since the question says "working together" I added the weights as if it's one machine weighing W=8+7=15.
As in the rate problems where we add the rates of both machines to reach a combined rate
- by SaraLotfy
Wed Oct 02, 2013 9:58 am- Forum: Problem Solving
- Topic: Time formula - no answer choices
- Replies: 6
- Views: 2744
Press machine
On Sunday morning, a printing press printed its newspapers at a constant rate from 1AM to 4AM. How many newspapers did the printing press print on Sunday? 1)The printing rate on Saturday morning was twice the rate on Sunday morning 2)On Saturday morning, the printing press ran at a constant rate fro...
- by SaraLotfy
Wed Oct 02, 2013 9:54 am- Forum: Data Sufficiency
- Topic: Press machine
- Replies: 2
- Views: 1458
- by SaraLotfy
Wed Oct 02, 2013 9:32 am- Forum: Problem Solving
- Topic: Time formula - no answer choices
- Replies: 6
- Views: 2744
- by SaraLotfy
Wed Oct 02, 2013 9:26 am- Forum: Problem Solving
- Topic: Tiles - work problem
- Replies: 5
- Views: 3333
Time formula - no answer choices
At supersonic corporation, the time required for a machine to complete a job is determined by the formula t= Sqrt/W + Sqrt/(W+1) where W= the weight of the machine in pounds and t=the hours required to complete the job. If machine A weighs 8 pounds, and machine B weighs 7 pounds, how many hours will...
- by SaraLotfy
Wed Oct 02, 2013 9:24 am- Forum: Problem Solving
- Topic: Time formula - no answer choices
- Replies: 6
- Views: 2744
Tiles - work problem
Adam and Brianna plan to install a new tile floor in a classroom. Adam works at a constant rate of 50 tiles per hour, and Brianna works at a constant rate of 55 tiles per hour. If the new floor consists of exactly 1400 tiles, how long will it take Adam and Brianna working together to complete the ti...
- by SaraLotfy
Wed Oct 02, 2013 8:50 am- Forum: Problem Solving
- Topic: Tiles - work problem
- Replies: 5
- Views: 3333