Search found 26 matches
- by praxis
Mon Mar 09, 2009 11:01 am- Forum: Problem Solving
- Topic: greatest prime factor
- Replies: 7
- Views: 2158
That's very odd; the site shows at least 8 questions in that category. I'll see how long it takes to get fixed!
- by praxis
Mon Mar 09, 2009 9:52 am- Forum: Problem Solving
- Topic: greatest prime factor
- Replies: 7
- Views: 2158
Could you be hitting burnout? When is your test scheduled for?
A weekend or two off to blow off steam and recuperate might help you get ready for the stretch run to the finish.
- by praxis
Mon Mar 09, 2009 9:44 am- Forum: GMAT Strategy
- Topic: CAT scores decreasing
- Replies: 4
- Views: 1679
How long do you have, and how hard have you been practicing? If you have time, and have been practicing hard, I recommend taking a sabbatical for a week to reccuperate. Then practice again... Almost like a muscle, your brain needs some recovery time. Of course, if you haven't been practicing, you ne...
- by praxis
Mon Mar 09, 2009 6:41 am- Forum: GMAT Strategy
- Topic: How do I break out of a range?
- Replies: 2
- Views: 1353
Hah, I read the (1) and (2) in the question as part of the equations.
Pretend I said what DanaJ said.
Moving right along....
- by praxis
Mon Mar 09, 2009 6:38 am- Forum: Data Sufficiency
- Topic: Is x + y < 1 ?
- Replies: 8
- Views: 8328
When you multiply an inequality by a negative number, the sense of the inequality is reversed. For example, take " x < 1 ". Multiply by -1, and reverse the sense to get " -x > -1 ", not " -x < -1 ". (1) subtract 1, and multiply by -1 to get x > 1/9 (2) subtract 2, and m...
- by praxis
Mon Mar 09, 2009 6:31 am- Forum: Data Sufficiency
- Topic: Is x + y < 1 ?
- Replies: 8
- Views: 8328
Remember, you don't need to calculate p, only to know that it would be possible to calculate p! (1) You could create a list of prime numbers; p is the 100th prime. This is sufficient. (2) You could create a list of all prime numbers less than 3912. Then you could count them, and that number would be...
- by praxis
Fri Mar 06, 2009 6:47 am- Forum: Data Sufficiency
- Topic: prime number question
- Replies: 1
- Views: 1117
(1/5)^m x (1/4)^18= 1/(2*(10)^35) can be simplified by multiplying through by 4^18 = 2^36 and then collecting terms under common exponents: (1/5)^m = (2^36) / (2 * 10^35) = 2^35 / 10^35 = (2/10)^35 = (1/5)^36 So m = 36. Want more practice on Exponents and Roots? Try http://www.testsandtutors.com/cou...
- by praxis
Fri Mar 06, 2009 6:37 am- Forum: Problem Solving
- Topic: GMAT factorial question
- Replies: 3
- Views: 1447
All the factors of h(n) are even, so h(n) is even and h(n)+1 is odd. The smallest prime factor is just the smallest factor, not including 1. Examples: n=2: h(n) + 1 = 3: 3 n=4: h(n) + 1 = 9: 3 n=6: h(n) + 1 = 49: 7 n=8: h(n) + 1 = 385: 5 Clearly we cannot calculate h(100), and the smallest prime fac...
- by praxis
Fri Mar 06, 2009 6:29 am- Forum: Problem Solving
- Topic: Integer Question
- Replies: 4
- Views: 1794
Statement (2) means that team N didn't go 1-2,2-3,3-4, or 4-5. Therefore 1 and 2 must be different teams, and 2 and 3 different, but 1 and 3 could be the same. This is not sufficient because you could have either of these orders (or lots of others): place team team 1 1 1 2 2 2 3 1 3 4 2 1 5 1 2 the ...
- by praxis
Thu Mar 05, 2009 2:08 am- Forum: Data Sufficiency
- Topic: Points allocation
- Replies: 1
- Views: 1332
E! The idea of making examples of a few notable people is to cause the unprosecuted majority to change their behaviours. Knowing if this is an effective tactic or not goes to the heart of the question. B is an interesting alternate, but I believe that it is 'common knowledge' that many, many people ...
- by praxis
Wed Mar 04, 2009 6:59 pm- Forum: Critical Reasoning
- Topic: Illegal music downloading
- Replies: 7
- Views: 2582
Have you identified any particular types of problems you're missing? I recommend looking at the types of questions you get wrong and practicing those. If you're not sure, perhaps you should look for a private tutor for a few hours to help you identify your weaknesses, or look at categorized online q...
- by praxis
Wed Mar 04, 2009 8:33 am- Forum: GMAT Math
- Topic: need to boost my maths skills
- Replies: 1
- Views: 1491
"have even" is clumsy; even is modifying greater, so it's an adverb IIRC. I think the underlining is wrong? Shouldn't it stop before "the particulars of the plan. " IMO best would be "an even greater significance than", but that's not an option. The options ending in 'h...
- by praxis
Wed Mar 04, 2009 7:56 am- Forum: Sentence Correction
- Topic: tax plan
- Replies: 3
- Views: 3599
The greatest one-year growth was between 98 and 99. Several options include this period, but since the other periods had lower growth, the AVERAGE growth for the longer time periods is smaller. Therefore the answer is D.
- by praxis
Wed Mar 04, 2009 7:49 am- Forum: Problem Solving
- Topic: Company X greatest
- Replies: 4
- Views: 1447
There are 20 oranges, and B baskets. Since each basket has at least 1 orange, and the number of oranges per basket is the same, there are only a limited number of possibilities; B must be a factor of 20. So B can be 1, 2, 4, 5, 10 or 20. (1) if B was halved, there would be twice as many oranges per ...
- by praxis
Tue Mar 03, 2009 8:19 pm- Forum: Data Sufficiency
- Topic: Baskets with oranges
- Replies: 3
- Views: 2030