Search found 283 matches
I am missing something here. Why it's not B=3G in the second question as the wording in the second one is similar to the first question? 3 times as many people aged twenty-one or under as there are people over twenty-one U = 3 O 3 times as many girls as boys in Mr. Smith's class. G = 3 B Hope this ...
- by ganeshrkamath
Fri Nov 08, 2013 6:25 am- Forum: Problem Solving
- Topic: Population
- Replies: 14
- Views: 2787
In a certain population, there are 3 times as many people aged twenty-one or under as there are people over twenty-one. The ratio of those twenty-one or under to the total population is (A) 1 to 2 (B) 1 to 3 (C) 1 to 4 (D) 2 to 3 (E) 3 to 4 U = n(age<=21) O = n(age>21) U = 3O U/(U+O) = 3O/(3O + O) ...
- by ganeshrkamath
Thu Nov 07, 2013 9:03 pm- Forum: Problem Solving
- Topic: Population
- Replies: 14
- Views: 2787
A and S are running a race of 5000 metres. A finishes the race 40 secs before S. If S's speed while running is 25m/sec. what is A's speed 20m/sec 28.75m/sec 31.25m/sec 34.50m/sec Time taken by S to cover 5000 meters at 25m/sec = (distance/speed) = 5000/25 = 200 seconds Time taken by A to cover 5000...
- by ganeshrkamath
Thu Nov 07, 2013 12:55 am- Forum: Problem Solving
- Topic: A and S
- Replies: 3
- Views: 1299
The typical distance formula is: Rate x time = Distance Yet this problem uses the formula with: Distance x Rate = Time I need to know why please. Its very confusing. After driving to a riverfront parking lot, Bob plans to run south along the river, turn around, and return to the parking lot, runnin...
- by ganeshrkamath
Wed Nov 06, 2013 11:19 am- Forum: Problem Solving
- Topic: Confused with Distance, rate and time formula
- Replies: 2
- Views: 2703
- by ganeshrkamath
Wed Nov 06, 2013 11:13 am- Forum: Problem Solving
- Topic: Probability Problem
- Replies: 6
- Views: 1657
Remove x11 from the totaltheCodeToGMAT wrote:Pages 732
_ _ _
1 in Unit digit = 730/10 = 73 + 1 = 74
1 in Ten's Digit = 700/10 = 70 + 10 = 80
1 in Hundred's Digit = 100
So total = 100 + 74 + 80 = 254
So, 254/732
254 - 8 = 246
Cheers
- by ganeshrkamath
Wed Nov 06, 2013 3:03 am- Forum: Problem Solving
- Topic: Probability Problem
- Replies: 6
- Views: 1657
A book contains 732 pages numbered 1,2....732. If a student randomly opens the book, whats is the probability that the page number contains digit 1? I had 246/732 for an answer and wanted to make sure its the right answer. 0xy : 0x1, 01x => 10 + 10 - 1 = 19 1xy : 100 2xy : 19 3xy : 19 4xy : 19 5xy ...
- by ganeshrkamath
Wed Nov 06, 2013 2:54 am- Forum: Problem Solving
- Topic: Probability Problem
- Replies: 6
- Views: 1657
You have 10 pairs of socks, 5 black pairs and 5 blue pairs, but they are not paired up. Instead, they are all mixed up in a drawer. Its early in the morning and you don't want to turn on the lights in your dark room. 1) How many socks must you pull out to garantee that you have a pair of one color?...
- by ganeshrkamath
Wed Nov 06, 2013 2:47 am- Forum: Problem Solving
- Topic: Worst case Scenario Problem
- Replies: 2
- Views: 4035
Sam observed that when it is 10am in City A it is 4pm on the previous day in City B. Sam boards a flight from City A that takes off at 3am City A local time and arrives in City B at 7am City B local time. On the return leg of the journey from City B to City A the plane flew at double the speed and ...
- by ganeshrkamath
Wed Nov 06, 2013 12:04 am- Forum: Problem Solving
- Topic: city
- Replies: 1
- Views: 2825
Is n negative? 1. (1 – n^2) < 0 2. n^2 – n – 2 < 0 OA later 1. (1-n)(1+n) < 0 Case 1: (1+n) < 0 and (1-n) > 0 => n < -1 and n < 1 Case 2: (1-n) < 0 and (1+n) > 0 => n > 1 and n > -1 Not sufficient. 2. n^2 - n -2 < 0 (n+1)(n-2) < 0 Case 1: (n+1) < 0 and (n-2) > 0 => n < -1 and n > 2 (not possi...
- by ganeshrkamath
Tue Nov 05, 2013 11:50 pm- Forum: Problem Solving
- Topic: Inequality
- Replies: 2
- Views: 1125
Hello, Can you please assist with this question: Sam is driving ahead of Henry at a speed of 80m/hr. If Henry is driving at a speed of 60 m/hr and is 20 miles behind Sam, how long will it take for Sam to be 40 miles ahead of Henry? My approach was as follows: At current time t, we have: Rate x Time...
- by ganeshrkamath
Tue Nov 05, 2013 11:40 pm- Forum: Problem Solving
- Topic: Time taken by 2 drivers
- Replies: 6
- Views: 1495
To do a certain work , C alone takes thrice as long as A & B together. A alone would take as long as B& C together . All three together complete the work in 3 days. How long would each take separately ? Please solve this question No choices are there ! A's rate of work = 1/a B's rate of wor...
- by ganeshrkamath
Tue Nov 05, 2013 5:52 am- Forum: Problem Solving
- Topic: Time & Work
- Replies: 4
- Views: 1344
A certain clock marks every hour by striking a number of times equal to the hour, and the time required for a stroke is exactly equal to the time interval between strokes. At 6:00 the time lapse between the beginning of the first stroke and the end of the last stroke is 22 seconds. At 12:00, how ma...
- by ganeshrkamath
Tue Nov 05, 2013 2:34 am- Forum: Problem Solving
- Topic: Clock Problem - I can't even understand the question :)
- Replies: 2
- Views: 3126
The size of a television screen is given as the length of the screen’s diagonal. If the screens were flat, then the area of a square 21-inch screen would be how many square inches greater than the area of a square 19-inch screen? (A) 2 (B) 4 (C)16 (D)38 (E)40 OA is E . The diagonal of a square wi...
- by ganeshrkamath
Tue Nov 05, 2013 12:41 am- Forum: Problem Solving
- Topic: Difference of areas of 2 TVs
- Replies: 7
- Views: 1486
A gardener is going to plant 2 red rosebushes and 2 white rosebushes. If the gardener is to select each of the bushes at random,one at a time ,and plant them in a row ,what is the probability that the 2 rosebushes in the middle of the row will be the red rosebushes. A)1/12 B)1/6 C)1/5 D)1/3 E)1/2 P...
- by ganeshrkamath
Thu Oct 31, 2013 4:17 am- Forum: Problem Solving
- Topic: A gardener is going to plant 2 red rosebushes
- Replies: 8
- Views: 3984