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No problem!
There's a cheesy little trick I always use to remember where each quadrant is: You want to start where everything is positive. So the upper-right quadrant is Quadrant I. From there, you just go counterclockwise.
- by Rich@VeritasPrep
Wed Mar 30, 2011 12:31 pm- Forum: Data Sufficiency
- Topic: ds - coordinate
- Replies: 5
- Views: 1506
Hey ccassel, The answer is A . Quadrant II is the quadrant in which x values are negative and y values are positive. Statement 1 tells you the slope is -1/6. Any line with a negative slope MUST pass through Quadrant II (and Quadrant IV, by the way). Also (just FYI), any line with a positive slope MU...
- by Rich@VeritasPrep
Wed Mar 30, 2011 11:28 am- Forum: Data Sufficiency
- Topic: ds - coordinate
- Replies: 5
- Views: 1506
Congrats Mohit!!!
Wow...reading your debriefing does a teacher proud. Also, your turns of phrase make this teacher laugh 
So glad you found our lessons helpful.
Good luck on your future endeavors!
Sincerely,
Rich
- by Rich@VeritasPrep
Wed Mar 30, 2011 9:59 am- Forum: I just Beat The GMAT!
- Topic: 730(Q49,V41) Keep Calm and Carry On(GMAT-Mastersheet Inside)
- Replies: 8
- Views: 10122
Hey edelauna, Unfortunately, you can't go from x/y > 1 to x>y, because you don't know whether y is positive or negative (and thus you don't know whether or not the sign will flip). Statement 1 tells you that x > y though, but it doesn't tell you their signs. Statement 2 tells you x/y > 1, which mean...
- by Rich@VeritasPrep
Mon Mar 14, 2011 7:36 pm- Forum: Data Sufficiency
- Topic: Dont understand the answer to this
- Replies: 2
- Views: 1142
1. x = y^2 Substitute in the prompt: x^y < y^x ? (y^2)^y < y ^ (y^2) ? y^(2y) < y^(y^2) ? If y=2, then the answer is NO, because the two terms are equal. ( 2^(2*2) = 2^(2^2) ) If y=3, then the answer is YES, because 3^(2*3) < 3^(3^2) or 3^6 < 3^9. INSUFFICIENT 2. y>2 If y is a positive odd number an...
- by Rich@VeritasPrep
Mon Mar 14, 2011 7:24 pm- Forum: Data Sufficiency
- Topic: x^y < y^x?
- Replies: 2
- Views: 1122
Additionally, you could also notice that z-1 and z are consecutive integers. Therefore, it's a given that one is even and one is odd. Squaring a number doesn't change its parity (i.e. even/odd), so z^2 and (z-1)^2 (and thus x and y) are some combination of even and odd. As a result, the difference x...
- by Rich@VeritasPrep
Sun Mar 06, 2011 3:55 pm- Forum: Data Sufficiency
- Topic: If x, y, and z are positive integers..............
- Replies: 5
- Views: 7554
The 6 technicians would take 10 hours to complete the job. They work from 11 to 5, which is a 6 hour period. That means that if the 6 technicians continued with the rest of the job, it would take 10-6 = 4 hours. Since 6 technicians would complete the remaining work in 4 hours, that means 1 technicia...
- by Rich@VeritasPrep
Fri Mar 04, 2011 9:02 pm- Forum: Problem Solving
- Topic: Work - Rate Problem - Computer Server
- Replies: 6
- Views: 3968
An interesting way to approach this problem is to re-phrase the prompt in terms of prime factorization. "Is the integer n a multiple of 15?" is really asking "Does n have both 3 and 5 as factors?" or alternately "Is n a multiple of both 3 and 5?" Statement (1) tells you...
- by Rich@VeritasPrep
Thu Mar 03, 2011 2:04 pm- Forum: Data Sufficiency
- Topic: GMAT Prep (Pract2) Multiples
- Replies: 3
- Views: 1508
This is a question that has been bounced around on many MANY forums. It's not a very GMAT-like question, because its language is not precise enough. The biggest problem I see with the question is that it is unclear whether order matters. "How many ways" could involve distinct arrangements ...
- by Rich@VeritasPrep
Thu Mar 03, 2011 12:50 pm- Forum: Problem Solving
- Topic: combination and permutation
- Replies: 2
- Views: 1144
If all else fails, use concrete numbers to illustrate: We know 180 people have houses in both locations. We know 1/2 of the total have a house in Palm Beach We know 2/3 of the total have a house in the Hamptons Let's say 30 people have a house in Palm Beach only. That's 180+30 = 210 people total tha...
- by Rich@VeritasPrep
Thu Mar 03, 2011 8:58 am- Forum: Data Sufficiency
- Topic: both in the Hampton's and in Palm Beach
- Replies: 7
- Views: 2330
Again, the list you're given might not be ordered in its original form, but if you are asked for the median, you must put the list in order before finding the result. As an example, if I gave you this list... 2, 78, 22, 4, 8 ...and then I asked you for the median, the correct answer would NOT be 22....
- by Rich@VeritasPrep
Thu Mar 03, 2011 8:33 am- Forum: Problem Solving
- Topic: median
- Replies: 9
- Views: 2104
The "neither" group is not our final concern. But to reiterate what I said in my previous post, it is an essential piece of information that enables us to find the ratio asked for in the problem. If you want to represent this algebraically, you could do it as follows: P+180+H+N = Total whe...
- by Rich@VeritasPrep
Thu Mar 03, 2011 8:22 am- Forum: Data Sufficiency
- Topic: both in the Hampton's and in Palm Beach
- Replies: 7
- Views: 2330
Hey Night reader, A median by it's very definition is the midpoint of an ordered list. So when we're asked specifically for a median, we don't have to assume that the list we'll look at is ordered. We know it must be ordered. The list given in the prompt does not specify on which days the student ea...
- by Rich@VeritasPrep
Thu Mar 03, 2011 8:00 am- Forum: Problem Solving
- Topic: median
- Replies: 9
- Views: 2104
Conceptually speaking, there's one huge giveaway that the answer will be E , and that's the lack of information about the "neither" group. We're told explicitly in the prompt that "not everyone at the fundraiser had a house in either the Hampton's or Palm Beach", meaning that som...
- by Rich@VeritasPrep
Thu Mar 03, 2011 7:55 am- Forum: Data Sufficiency
- Topic: both in the Hampton's and in Palm Beach
- Replies: 7
- Views: 2330
If you're unsure of the algebraic properties, this question is a very good candidate for testing numbers. In fact, that's probably the fastest way to go about this problem. The question is "What is the remainder when the positive integer X is divided by 3?" Let's look at the statements: a)...
- by Rich@VeritasPrep
Thu Mar 03, 2011 7:46 am- Forum: Problem Solving
- Topic: Remainder
- Replies: 3
- Views: 1085