Search found 9 matches
the answer is e, the prime has to be larger than 40. why, because h(100)+1 cannot be divisible by 2,4, 6,8, ....,96, 98, 100, and therefore it is not divis by 2,3,4,....48, 48, 50.
you can post this on gmatgremath.blocked if you want a gmat tutor's official answer, but i think e is correct.
- by reneerenee
Wed Jan 07, 2009 12:11 pm- Forum: Problem Solving
- Topic: stuck on prime factor Q
- Replies: 2
- Views: 1522
the mgmat has the hardest of the real gmat questions. on the real gmat, if you are doing well, you will see hard problems and medium problems.
you can post mgmat questions at gmatgremath.blocked to see how a gmat tutor works them out.
- by reneerenee
Wed Jan 07, 2009 12:08 pm- Forum: GMAT Math
- Topic: REAL math vs. MGMAT math ?
- Replies: 3
- Views: 2476
- by reneerenee
Wed Jan 07, 2009 12:05 pm- Forum: GMAT Math
- Topic: Math Problem
- Replies: 2
- Views: 1602
i think there are 8 ways to put 4 letters in the envelopes to make only one be the right letter. there are 4 ways to choose the right letter, and then only two ways to scramble the remaining 3 ltters so that none of them match. then 8/24 = 1/3 is the right answer becoause there are 24 ways to do the...
- by reneerenee
Wed Dec 10, 2008 3:02 pm- Forum: Problem Solving
- Topic: Princeton GMAT Math Bible------Permutation
- Replies: 3
- Views: 4107
if the ordering part is confusing to you, look at answer D, 71. 71 is less that 73 and 82. it's less than 2 out of the 8 numbers in the list, so it's less thatn 1/4. 71 is greater thatn the 6 of the numbers inthe list. 6 out of 8 is 3/4. go here if you need really detailed answeres, it's a gmat tuto...
- by reneerenee
Fri Dec 05, 2008 11:07 am- Forum: GMAT Math
- Topic: GMAT Prep Practice Test
- Replies: 8
- Views: 9173
no need to focus on the first 20, first 10 first 5, all the questions count equally and if you don't finish the test, your score is lowere than if you answer the quwstions wrong. use that as a motivator 
- by reneerenee
Fri Dec 05, 2008 10:54 am- Forum: GMAT Math
- Topic: Having trouble with time
- Replies: 1
- Views: 1413
whoops! sorry about that! I totally meant 1/2, and 1/2 = B. you're right. I'm gonna get killed on the gmat if i can't fill in the right letters!
- by reneerenee
Tue Dec 02, 2008 6:05 pm- Forum: Problem Solving
- Topic: Geometry
- Replies: 7
- Views: 1775
i thinkk its [b]D[/b]. subtract 120000 from Anns numbers and add it to Cal's numbers and you'll get the conditions that the problem asked for.
- by reneerenee
Tue Dec 02, 2008 5:53 pm- Forum: Problem Solving
- Topic: PLEASE explain this math question
- Replies: 3
- Views: 1553
i think its C. the triangle that you get when the angle is 90 is half of a 1x1 square and it's area is 1/2. there is a similar question like this up at the gmat and gre math blog (gmatgremath.blocked) He or she or they or whoever runs that blog has really great geometric pictures to explaing the pro...
- by reneerenee
Tue Dec 02, 2008 5:39 pm- Forum: Problem Solving
- Topic: Geometry
- Replies: 7
- Views: 1775