GMAT Problem Solving Discussions

MBA
1658
jishnu.nandy Says
And OA for 37 is C


37 must be 'D'

multiply all the fractions with (3^2) * (5^2), we get

A- 1
B- 2
C- (7/3)
D- (45/15) = 3
E- (75/1125) = 1/15

So Clearly D is the Winner.
1659

I am not confident that the answers which i have are absolutely correct , coz i downloaded these stuff from the net.
Even my answers did not match the PDF , so i was checking with you guys.
What do you guys say?
My answers were:

26 C
28 B
30 Could n't figure out , did not understand it at all!! :(
36 Could n't figure out , did not understand it at all!! :(

37 D ( Making all the denominator 675 except for E, as it significantly low )

1660

Please Send it to [email protected] and also post it for the other users!
Thanks!

1661
28 B
26 A
30 C

36 D

Please Explain Bhai!!

Soln to q26)
eqn of circle is x^2+y^2=2500
stem !: x co-ord is -30 which gives 2 values of y = +/-40 which are symmetrical abt X-axis, hence distance of P from either points (Q1 or Q2) would be same.

However, stem 2 gives 2 points of Q which lie in 3rd and 4th quadrants and are not equidistant from P

Hence only A is suff

Q30) already explained by alchemist
Q36) When x is +ve, mod x and x are same and its ratio = 1 =>suff
stem 2: x=5 which again implies ratio = 1...suff

hence D

hope it helps

dear alchemist-mba, sometimes hurrying up things makes us think in a totally diff line. for Q26, we calculated the x and y co-ordinates but perhaps forgot to draw a circle and check for suficiency....hv got to be more careful!!
1662
Please Send it to and also post it for the other users!
Thanks!


Dear jishnu,

Please dont post your id in publin threads on PG, its against PG policy.
Instead you should use the 'Private Message' functionality provided to send someone your personal mail id if needed.

Thanks!
1663
My Answer would be D.

Consider - a total of 100 students..
3rd year = 40
not 2nd year = 70

rest of the students(not 2nd or 3rd years) = not second year - 3rd year
= 70 - 40 = 30

what fraction of students who are not 3rd yr are 2nd yr students =
who are 2nd yr/ who are not 3rd yr

who are 2nd yr = 100 - 70 = 30
who are not 3rd yr = who are 2nd yr + rest of the students(not 2nd or 3rd years) = 30 + 30 = 60

So, answer would be 30/ 60 = 1/2.

What is the OA?


The OA is 4/7
1664

One more question

Is the number of seconds required to travel d1 feet at r1 feet per second greater than the number of seconds required to travel d2 feet at r2 feet per second?
(1) d1 is 30 greater than d2.
(2) r1 is 30 greater than r2.
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

1666

Hi Puys,

Please help ! 😞

1667
Hi Puys,

Please help ! :(

My picks are A & E........
1668

The OAs' Are:
33 A
17 E

1669

Please Explain the No. 17!

1670
The OAs' Are:
33 A
17 E


33. lets create a data box for this.......easy way....

year population PC users
---- --------- --------

1994 x 40%*x

1998 104%*x 130%*40%*x

so required % = (130%*40%*x)*100/(104%*x )=50%

17. from diagram we can infer that average lies between -r(since R
so average of 3 no:= (s+t-r)/3

Hope this helps........:-o
1672

dear jishnu, attached file contains solution

thanks

1673

Hey,
Got a problem here I had some trouble understanding.
It's from the GMAT Powerprep.

The correct Answer is 7, i marked 2 :)
Could anyone help me understand how this works?

Thanks :)
-Sharan


1674
Hey,
Got a problem here I had some trouble understanding.
It's from the GMAT Powerprep.

The correct Answer is 7, i marked 2 :)
Could anyone help me understand how this works?

Thanks :)
-Sharan




4^17 - 2^28 = (2^2)^17 - 2^28
= 2^34 - 2^28 = 2^28 (2^6 - 1)
= 2^28 (63)
= 2^28 (9 * 7)
Hence the greatest prime factor should be 7.

Hope this helps.
1675

Hey Alchemist,
Thanks a ton.. a huge.. big.. heavy.. one.. (Unlike those other useless lightweight tons)
Right right.. Take the common stuff out, expand what's remaining .. and VOILA!!

Well, my GMAT's in a little more than 24 hours.. and I'm going to be chilling most of the time.
However, I did want to look up and revise some basics.
Do you know any good sites which have some tips and tricks, and a list of basic formulae? .. like how to operate on Something raised to soemthing (x^3 - y^7) .. just to brush up?

Btw.. one more question.. and I know it's really basic, but it's been bothering me because of a solution in a Kaplan test.

If I say a value is 1 and x is an integer.. then possible values of x are 2,3 or 1,2,3?

From what I understand when given a range of x like this, x would be anything between __ 1.00....01 to 3.99999....__ (including non-integers) but would not be equal to 1 or 4.

Thanks again for the help,
Sharan

1676
Hey Alchemist,
Thanks a ton.. a huge.. big.. heavy.. one.. (Unlike those other useless lightweight tons)
Right right.. Take the common stuff out, expand what's remaining .. and VOILA!!

Well, my GMAT's in a little more than 24 hours.. and I'm going to be chilling most of the time.
However, I did want to look up and revise some basics.
Do you know any good sites which have some tips and tricks, and a list of basic formulae? .. like how to operate on Something raised to soemthing (x^3 - y^7) .. just to brush up?

Btw.. one more question.. and I know it's really basic, but it's been bothering me because of a solution in a Kaplan test.

If I say a value is 1 and x is an integer.. then possible values of x are 2,3 or 1,2,3?

From what I understand when given a range of x like this, x would be anything between __ 1.00....01 to 3.99999....__ (including non-integers) but would not be equal to 1 or 4.

Thanks again for the help,
Sharan


You are welcome..

and coming to the queries -> yes if 1
reg. websites.. imnt sure of any.. check esnips.com for some flashcards they really contain a gr8 deal of last minute info.

All the best for ur exam.
1677

Perfect answer is E

1678
PursuitOfHappy Says
Perfect answer is E

Bro...what are u answering here 😁
1679

The Answer is "E" to my question?
Confoosed

BTW: TIP: Day before GMAT, do something to calm nerves... I'm doing Kaplan tests... lots of fun. 😛