Search found 37 matches
thanks Ian
somebody compiled a list of questions from gmatprep. Found this question in that list. OA was given as 3,6.
May be it is a typo ...'could' instead of 'must'.
- by rainbownlife
Sat Jun 14, 2008 11:15 am- Forum: Problem Solving
- Topic: divide k evenly
- Replies: 3
- Views: 2887
divide k evenly
If k=m(m+4)(m+5) k and m are positive integers. Which of the following could divide k evenly? I.3 II.4 III.6 I think all three could divide k evenly. OA posted is 3,6 only. Not sure about the correctness of the OA.... if m=3 , 4 cud divide the expression? I would understand ans =3,6 , if question as...
- by rainbownlife
Fri Jun 13, 2008 3:01 pm- Forum: Problem Solving
- Topic: divide k evenly
- Replies: 3
- Views: 2887
Hi lagomez
Thanks for taking the efforts to explain your approach...
I think i get the idea
thank you so much.
- by rainbownlife
Thu Apr 03, 2008 10:02 am- Forum: GMAT Math
- Topic: GMATPrep questions - need a better approach for these
- Replies: 2
- Views: 2515
GMATPrep questions - need a better approach for these
Please share the best way to solve these two questions in a decent time.
thanks.
- by rainbownlife
Wed Apr 02, 2008 9:28 am- Forum: GMAT Math
- Topic: GMATPrep questions - need a better approach for these
- Replies: 2
- Views: 2515
- by rainbownlife
Wed Apr 02, 2008 9:24 am- Forum: Data Sufficiency
- Topic: Need a faster way to solve this mathematically?
- Replies: 2
- Views: 1687
- by rainbownlife
Wed Apr 02, 2008 9:21 am- Forum: Data Sufficiency
- Topic: DS OG #142
- Replies: 5
- Views: 2292
DS OG #142
if x is an integer, is 9^x + 9^(-x) = b? 1) 3^x + 3(-x) = sqrt(b+2) 2) x > 0 = b I understand and can solve (1) However what is 2) In the explanation OG says that the given info is NOT SUFFICIENT. Can somenody please explain what this expression means ?? If i assume that expression means x>0 and b=0...
- by rainbownlife
Fri Mar 28, 2008 9:30 am- Forum: Data Sufficiency
- Topic: DS OG #142
- Replies: 5
- Views: 2292
Need a faster way to solve this mathematically?
is x -ve?
1) x^3(1-x^2)<0
2) x^2 - 1 <0
I got the answer by considering ranges where solution will be valid.However....could not finish not 2 mins!
Anyone has a faster method ??
- by rainbownlife
Fri Mar 28, 2008 9:29 am- Forum: Data Sufficiency
- Topic: Need a faster way to solve this mathematically?
- Replies: 2
- Views: 1687
Hi Stuart This is question 142 from official guid 11 (DS section). Yes it is printed as x>0=b Dont have the book at this moment with me but as far as i remember, the explanation uses picking values to solve and I wanted to understand mathematically. can x>0=b be a printing mistake? (i am using editi...
- by rainbownlife
Wed Mar 26, 2008 8:42 am- Forum: Data Sufficiency
- Topic: DS Exponents
- Replies: 2
- Views: 1579
absolute value and exponent
sorry missed to check that HTML box!
This is a question from OG
Is x|x| <2>= 0
scenario 2: x<0>=0
then x^2 < 2 ^x
Please help me form inequality for scenario 2.
x is an exponent and got confused if inequality sign will change....
What would be the inequality if x <0?
thanks.
- by rainbownlife
Tue Mar 25, 2008 3:22 pm- Forum: Data Sufficiency
- Topic: absolute value and exponent
- Replies: 1
- Views: 1752
DS Exponents
Is 9^x + 9^(-x) = b ? (1)x > 0 = b Is is a sufficient condition? Here is my working: putting value of b we get Is 9^x + 9^(-x) = 0 ? => 9^x + 1/9^x = 0 =>( 9^2x + 1 ) /9^x = 0 This will be true only if 9^x (is not equal to) 0 and 9^2x = -1 (this is not possible as even power cannot be -ve) and 9^x c...
- by rainbownlife
Tue Mar 25, 2008 3:22 pm- Forum: Data Sufficiency
- Topic: DS Exponents
- Replies: 2
- Views: 1579
- by rainbownlife
Tue Mar 04, 2008 10:01 am- Forum: Problem Solving
- Topic: GMATPrep question - absolute value
- Replies: 4
- Views: 1718
anybody?
I am looking for approach to solve such problems with roots and equations/inequalities.
thanks in advance!
- by rainbownlife
Tue Mar 04, 2008 9:34 am- Forum: Problem Solving
- Topic: GMATPrep question - absolute value
- Replies: 4
- Views: 1718
GMATPrep question - absolute value
Can some one explain steps to solve such questions.
thanks![/img]
- by rainbownlife
Mon Mar 03, 2008 12:21 pm- Forum: Problem Solving
- Topic: GMATPrep question - absolute value
- Replies: 4
- Views: 1718
: - by rainbownlife
Fri Feb 29, 2008 7:18 pm- Forum: Problem Solving
- Topic: Greatest absolute value?
- Replies: 12
- Views: 13945