Search found 50 matches
- by gander123
Sun Jan 13, 2013 7:02 am- Forum: Data Sufficiency
- Topic: Quotient of positive integers r and s
- Replies: 6
- Views: 3913
Quotient of positive integers r and s
Hey, QDS03324 GMAT Prep Question Pack 1: "If r and s are positive integers, is r/s an integer? (1) Every factor of s is also a factor of r. (2) Every prime factor of s is also a prime factor of r." OA: A OA Explanation for (1): The integer s is by definition a factor of itself. From this, ...
- by gander123
Sun Jan 13, 2013 4:11 am- Forum: Data Sufficiency
- Topic: Quotient of positive integers r and s
- Replies: 6
- Views: 3913
- by gander123
Sun Jan 13, 2013 2:05 am- Forum: Problem Solving
- Topic: Roman Numeral Question on Set of Numbers
- Replies: 2
- Views: 1041
Hey Schao, I assume that you know what the absolute value means ?! If y is an integer, deduct a multiple of 5 from 23, look at the absolute value of this expression and decide whether you have reached the smallest possible value. Try this for y = 4 and y = 5: |23-5*4|= |23-20| = |3| = 3 |23-5*5| = |...
- by gander123
Sat Jan 12, 2013 6:37 am- Forum: Problem Solving
- Topic: Real Number (OG13, p,202, Q51)
- Replies: 3
- Views: 988
Roman Numeral Question on Set of Numbers
Hey QPS00253 GMAT Prep Pack 1 "For a certain set of numbers, if x is in the set, then x-3 is also in the set. If the number 1 is in the set, which of the following must also be in the set? I. 4 II. -1 III. -5 OA: C OA explanation: "The rule for set membership is: If x is in the set, then x...
- by gander123
Sat Jan 12, 2013 4:07 am- Forum: Problem Solving
- Topic: Roman Numeral Question on Set of Numbers
- Replies: 2
- Views: 1041
Hey there,
The values of B and C are IRRELEVANT.
THANK YOU very much. That's exactly what I was looking for.Yes, you will only round by the very next digit (not the string).
Brgds,
Tobi
- by gander123
Thu Jan 10, 2013 11:53 pm- Forum: Data Sufficiency
- Topic: Rounding - Need back-up !
- Replies: 5
- Views: 1764
Hey Jim, thanks for answering so quickly.. .146 = .1 (not .15 = .2) I would have rounded that expression to 0.2 by taking the thousandths digit first, then the hundredths digit and so on. I would have done the same on statement (2) in the problem. So when the statement gives "rounded to the nea...
- by gander123
Thu Jan 10, 2013 2:14 pm- Forum: Data Sufficiency
- Topic: Rounding - Need back-up !
- Replies: 5
- Views: 1764
Rounding - Need back-up !
Hey guys, The following caused some confusion to my understanding of rounding principles.... GMAT Prep Software, Problem QDS14011: " 3.2XY6 If X and Y each represent single digits in the decimal above, what digit does X represent? (1) When the decimal is rounded to the nearest tenth, 3.2 is the...
- by gander123
Thu Jan 10, 2013 12:18 pm- Forum: Data Sufficiency
- Topic: Rounding - Need back-up !
- Replies: 5
- Views: 1764
Hey vinni, Why should we concerned about y = 1 when we are already getting x = 0 as it is being already asked ? You seem to rule out the possibility that x can be something different than 0. But look closely at statement (1). As you say, y = 1. But then, numerous valous for X satisfy the equation xy...
- by gander123
Tue Jan 08, 2013 6:37 am- Forum: Data Sufficiency
- Topic: Is x = 0 ?
- Replies: 4
- Views: 1527
Good point... would have opted for for C though because its brings across the message more clearly... But I see what you mean...
- by gander123
Sat Jan 05, 2013 10:55 am- Forum: Sentence Correction
- Topic: Needs clarification in Verbal Ed2 questions
- Replies: 5
- Views: 1571
Hey Param,
I solved exactly as you did and it took me 4 minutes 
. Looked at Mitch's reasoning, which seems very fast. I guess its all about recognizing the short way ...
- by gander123
Sat Jan 05, 2013 10:19 am- Forum: Problem Solving
- Topic: Looking for a short method
- Replies: 3
- Views: 1096
Hey Whit, Any number that is even infinitesimally smaller than 10.5 would round down (e.g. 10.49999999999999999999). This means that there are actually an infinite number of numbers that are larger than 10.4 but still smaller than 10.5. So the best way to represent this range is to just say that the...
- by gander123
Sat Jan 05, 2013 3:22 am- Forum: Problem Solving
- Topic: Miles and gallons
- Replies: 5
- Views: 1326
Hey metalli, Agree with you, I also boiled down the problem to the following: x: number of miles driven y: number of gallons consumed x/y miles per gallon 95<= X <= 104 9.5<= Y <= 10.4 Thus, 95/10.4 <= x/y <= 104/9.5. The only plausible solution left would have been B. However, I understand your poi...
- by gander123
Fri Jan 04, 2013 10:18 am- Forum: Problem Solving
- Topic: Miles and gallons
- Replies: 5
- Views: 1326
Hey Param
What do you mean by "It" at the beginning...It can only yield an integer if we multiply 72 by 2...that is if N^2 = 2* 72 = 2*2 *6*6
Perhaps I'm driving the question to far....
Cheers,
Tobi
- by gander123
Fri Jan 04, 2013 6:57 am- Forum: Problem Solving
- Topic: Largest positive divisor of positive integer n
- Replies: 5
- Views: 1425
Largest positive divisor of positive integer n
Hoping that noone here has ever considered me an "Instigator" (Knewton), I would like to discuss the following problem with you. GMAT Official Guide Quantitative Review (2nd ed.): Q 169 Problem Sovling "If n is a positive integer, and n^2 is divisible by 72, then the largest positive ...
- by gander123
Fri Jan 04, 2013 4:30 am- Forum: Problem Solving
- Topic: Largest positive divisor of positive integer n
- Replies: 5
- Views: 1425