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If n is a positive integer and n2 is divisible by 72, then the largest positive integer that must divide n is: a)6 b)12 c)24 d)36 e)48 answer later Picking Number Approach: Least possible value of n² such that n² is divisible by 72 is 72*2 = 144 Hence, minimum possible value of n = 12. Largest po...
- by Anurag@Gurome
Tue Mar 05, 2013 7:37 pm- Forum: Problem Solving
- Topic: Divisibility Quant Review (#169)
- Replies: 6
- Views: 1976
When positive integer n is divided by 5, the remainder is 1. When n is divided by 7, the remainder is 3. What is the smallest possible integer k such that k+n is a multiple of 35? A)3 B) 4 C) 12 D) 32 E) 35 answer later.....(quant review wording for answer is very unclear for this problem) n = 5*a ...
- by Anurag@Gurome
Tue Mar 05, 2013 7:32 pm- Forum: Problem Solving
- Topic: Quant Review- Divisibility
- Replies: 2
- Views: 967
At a regular hourly rate, Don had estimated that labor cost of a repair job as $336 and he was paid that amount. However, the job took 4hrs longer that he had estimated and, consequently, he earned $2 per hour less than his regular hourly rate, What was the time Don had estimated for the job, in ho...
- by Anurag@Gurome
Tue Mar 05, 2013 7:30 pm- Forum: Problem Solving
- Topic: OG - Q.137
- Replies: 5
- Views: 1584
The probability that a teacher will give an unannounced test during any class meeting is 1/5.If a student is absent twice,then the probability that the student will miss at least one test is Probability of missing at least one test = Probability of missing test in only one day + Probability of miss...
- by Anurag@Gurome
Tue Mar 05, 2013 10:36 am- Forum: Problem Solving
- Topic: Probability problem
- Replies: 3
- Views: 11449
If [x] denotes the least integer greater than or equal to x, is [x]=0? (1) -1 < x < 1 (2) x < 0 Statement 1: Consider the following two cases, x = 0.5 ---> [x] = 1 x = -0.5 ---> [x] = 0 Not sufficient Statement 2: Consider the following two cases, x = -0.5 ---> [x] = 0 x = -1 ---> [x] = -1 Not suff...
- by Anurag@Gurome
Tue Mar 05, 2013 9:22 am- Forum: Data Sufficiency
- Topic: Question on Algebra in Data Sufficiency
- Replies: 3
- Views: 1492
- by Anurag@Gurome
Tue Mar 05, 2013 3:46 am- Forum: Problem Solving
- Topic: Bacteria Quadruples
- Replies: 3
- Views: 2283
- by Anurag@Gurome
Tue Mar 05, 2013 3:44 am- Forum: Problem Solving
- Topic: Basketball wins
- Replies: 2
- Views: 1111
A can do a piece of work in 10 days, B in 15 days. They work for 5 days. The rest of work finished by C in 2 days. If they get $1500 for the whole work, the daily wages of B and C are how much ? The money will be distributed on the basis of how much they have contributed, i.e. what fraction of the ...
- by Anurag@Gurome
Tue Mar 05, 2013 1:45 am- Forum: Problem Solving
- Topic: Time and work related
- Replies: 3
- Views: 1325
... I mean I know you aren't assuming anything, there must be a way to distingusih this. How did you make that distinction as it is vitally important on the test - if I see one of these God awful question I want to get it right. Selections and arrangements are different things. When you have to arr...
- by Anurag@Gurome
Tue Mar 05, 2013 1:13 am- Forum: GMAT Math
- Topic: Question regarding Manhattan Word Problems Book
- Replies: 2
- Views: 1357
That doesn't make any sense. Please check your source and post the actual question.candela.tartiere wrote:IF K IS A POSITIVE INTEGER SUCH THAT K/3 IS AN EVEN INTEGER AND IS AN ODD INTEGER, WHICH OF THE FOLLOWING MUST BE TRUE?
- by Anurag@Gurome
Tue Mar 05, 2013 12:39 am- Forum: Problem Solving
- Topic: INTEGERS
- Replies: 1
- Views: 903
343. Mark is playing poker at a casino. Mark starts playing with 140 chips, 20% of which are $100 chips and 80% of which are $20 chips. For his first bet, Mark places chips, 10% of which are $100 chips, in the center of the table. If 70% of Mark's remaining chips are $20 chips, how much money did M...
- by Anurag@Gurome
Mon Mar 04, 2013 9:42 pm- Forum: Problem Solving
- Topic: 343. Mark is playing poker at a casino. Mark starts playing
- Replies: 3
- Views: 1506
Each employee at a certain bank is either a clerk or an agent or both. Of every three agents, one is also a clerk. Of every two clerks, one is also an agent. what is the probability that an employee randomly selected from the bank is both an agent and a clerk? For each person who is both agent and ...
- by Anurag@Gurome
Mon Mar 04, 2013 9:27 pm- Forum: Problem Solving
- Topic: probability question
- Replies: 2
- Views: 1045
Does xy = x²? 1)y² - xy = 0 2)x² - 2xy + y² = 0 Statement 1: y² - xy = 0 ---> y(x - y) = 0 Now either y = 0 or x = y For y = 0, xy may not be equal to x² For x = y, xy is always equal to x² Not sufficient Statement 2: x² - 2xy + y² = 0 ---> (x - y)² = 0 ---> x = y Hence, xy is always equa...
- by Anurag@Gurome
Mon Mar 04, 2013 9:12 pm- Forum: Data Sufficiency
- Topic: Does xy=x2 (the 2 is the exponent)
- Replies: 4
- Views: 2256
Is their any other way to do this question? The method provided in the book is short and simple enough. You can try for 1 - [Not getting a sum of 5], but that will lead to a bit more calculation. Or you can try the following method which is almost same as the book. Number of ways to select 2 number...
- by Anurag@Gurome
Mon Mar 04, 2013 5:30 am- Forum: Problem Solving
- Topic: Nova Book
- Replies: 1
- Views: 1366
If n is an integer, is n-1>0? 1) n^2-n>0 2) n^2=9 Statement 1: n² - n > 0 ---> n(n - 1) > 0 This means either n and (n - 1) are of same sign. Hence, it is possible that, Both are positive ---> (n - 1) > 0 Both are negative ---> (n - 1) < 0 Not sufficient Statement 2: n² = 9 --> n = ±3 Not suffic...
- by Anurag@Gurome
Mon Mar 04, 2013 5:04 am- Forum: Data Sufficiency
- Topic: Is n-1>0?
- Replies: 1
- Views: 891