Search found 21 matches
Speedboat
Sorry might seem like an easy one but I don't have the answers so I thought I would make sure: A speedboat takes 3 hours longer to go 60 miles up a river than to return. If the boat cruises at 15 miles per hour in still water, what is the rate of the current? A. 4 mi/h B. 3 mi/h C. 6 mi/h D. 5 mi/h ...
- by charlie33
Sat Jul 11, 2009 7:44 am- Forum: Problem Solving
- Topic: Speedboat
- Replies: 9
- Views: 6602
Yes B is correct, I found the answer sheet.
It is from a class I took at my local university for the GMAT.
- by charlie33
Sun Jul 05, 2009 11:04 am- Forum: Problem Solving
- Topic: Radioactive - Tougher problem
- Replies: 8
- Views: 1803
- by charlie33
Sun Jul 05, 2009 10:50 am- Forum: Problem Solving
- Topic: Radioactive - Tougher problem
- Replies: 8
- Views: 1803
- by charlie33
Sun Jul 05, 2009 10:47 am- Forum: Problem Solving
- Topic: Radioactive - Tougher problem
- Replies: 8
- Views: 1803
Radioactive - Tougher problem
The radioactive element americium has a half-life of 432 years. Suppose we start with a 20-g mass of americium.
How much will be left after 367 years?
A. 17.0 g
B. 11.1 g
C. 15.5 g
D. 8.8 g
E. 18.0 g
- by charlie33
Sun Jul 05, 2009 9:53 am- Forum: Problem Solving
- Topic: Radioactive - Tougher problem
- Replies: 8
- Views: 1803
Cardboard Box
An open box is formed from a square piece of cardboard, by removing squares of side 5 in. from each corner and folding up the sides. If the volume of the carton is then 40 in^3, what was the length of a side of the original square of cardboard? A. 5+2sqrt2 in. B. 5+4sqrt5 in. C. 10+2sqrt2 in. D. 10+...
- by charlie33
Sun Jun 28, 2009 9:02 am- Forum: Problem Solving
- Topic: Cardboard Box
- Replies: 3
- Views: 1825
Fence on the Farm
A farmer wants to enclose a rectangular field along a river on three sides. If 4,400 feet of fencing is to be used, what dimensions will maximize the enclosed area? A. 1,100 ft (parallel to the river) by 1,100 ft B. 1,100 ft (parallel to the river) by 2,200 ft C. 2,200 ft (parallel to the river) by ...
- by charlie33
Sun Jun 28, 2009 8:56 am- Forum: Problem Solving
- Topic: Fence on the Farm
- Replies: 3
- Views: 5102
Boater
A boater travels 21 miles upstream against a 2 mi/h current, then returns downstream to the starting point. If the entire trip took 10 hours, what is the rate of the boat in still water?
A. 4 mi/h
B. 7 mi/h
C. 5 mi/h
D. 6 mi/h
E. 3 mi/h
- by charlie33
Sat Jun 27, 2009 9:03 am- Forum: Problem Solving
- Topic: Boater
- Replies: 4
- Views: 1515
Antifreeze Problem
How much pure antifreeze must be added to 12 gallons of 10% antifreeze to make a 40% antifreeze solution?
A. 9 gallons
B. 12 gallons
C. 3 gallons
D. 6 gallons
E. 4.8 gallons
- by charlie33
Sat Jun 27, 2009 8:01 am- Forum: Problem Solving
- Topic: Antifreeze Problem
- Replies: 3
- Views: 1590
Powerscore GMAT Weekend Course Review Chicago
I traveled to Chicago from Kansas City to take the Powerscore Weekend Course and I wasn't disappointed. The class was only $395 for 16 hours, which is the main reason I signed up. The class size was smaller than you would imagine, only 2 people, 1 person didn't show up. The instructor said it was th...
- by charlie33
Wed Mar 18, 2009 8:23 am- Forum: GMAT Strategy
- Topic: Powerscore GMAT Weekend Course Review Chicago
- Replies: 0
- Views: 3619
Two Switches
It is given that the probability that switch A is closed is 0.35 and the probability that switch B is closed is 0.40. It is also known that the 2 switches function independently. What is the probability that the radio is playing?
- by charlie33
Tue Mar 10, 2009 6:55 pm- Forum: Problem Solving
- Topic: Two Switches
- Replies: 1
- Views: 2203
Powerscore Test Preperation - Anybody?
Anybody done a powerscore test preperation weekend course? They are only $395 so I was considering doing one soon. I am really busy so committing myself to a weekend course is really going to help me. I was considering taking a weekend course that is $1200 and to see this one at $395 makes me wonder...
- by charlie33
Sun Mar 01, 2009 3:39 pm- Forum: GMAT Strategy
- Topic: Powerscore Test Preperation - Anybody?
- Replies: 0
- Views: 821
- by charlie33
Sat Feb 28, 2009 7:22 pm- Forum: Problem Solving
- Topic: Another Probability Question
- Replies: 2
- Views: 2010
Another Probability Question
The GMAT of 8 unborn children is to be determined today in a lab. What is the probability that 2 particular children (say the child of Elizabeth and the child of Maria) will be boys?
- by charlie33
Sat Feb 28, 2009 4:21 pm- Forum: Problem Solving
- Topic: Another Probability Question
- Replies: 2
- Views: 2010
- by charlie33
Sat Feb 28, 2009 9:55 am- Forum: I just Beat The GMAT!
- Topic: 610 Q42/V31 AWA 5.5
- Replies: 1
- Views: 2074