GMAT Problem Solving Discussions

[ani.jumech]

Originally Posted by abchekstylo

it will be 7 *5 = 35.

it will be 8C2*6C2=28*15=420

[Mr_Derivatives]

Originally Posted by nairpraveenk

A----------B---------C----------D


Is

CD > BC ?

(1) AD = 20
(2) AB = CD

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.

E is the answer

[Mr_Derivatives]

Originally Posted by yash.kotak

Hi guys,

|-4| (|-20|-|5|)=
A. –100 B. –60 C. 60 D. 75 E. 100

Acc to me the ans. is C , can someone confirm.....

Yes, u r right. "C" is the answer.

[CATfodwa]

hi guys,
seem to have veterans over here......i wanted to kick-off my gmat preparations now...need a brief overview as to where should i start and how should I go about it..!!

[Mr_Derivatives]

Originally Posted by harneet.m.kaur

Can someone pls help me with this problem ?
If y ≠ 3 and is a prime integer greater than 2, which of the following must be true?
Ⅰ. x = y
Ⅱ. y = 1
Ⅲ. x and y are prime integers.
(A) None
(B) Ⅰ only
(C) Ⅱonly
(D) Ⅲonly
(E) Ⅰand Ⅲ

Question is incomplete

[Mr_Derivatives]

Originally Posted by harneet.m.kaur

Can some one help with this problem ?


The dimensions of a rectangular box - 2, 8, 20 inches is to be completely wrapped with paper. If a single sheet of paper is to be used without patching, then the dimensions of the paper could be
(A) 17 in by 25 in
(B) 21 in by 24 in
(C) 24 in by 12 in
(D) 24 in by 14 in
(E) 26 in by 14 in

Surface area of box is 432.
Surface area of options is as below
(A) 425
(B) 504
(C) 288
(D) 336
(E) 364
So, only 504 sq inches can cover the box.
Answer is B.

[Mr_Derivatives]

Originally Posted by ashishjha100

. If y ≠ 3 and 3x/y is a prime integer greater than 2, which of the following must be true?
Ⅰ. x = y
Ⅱ. y = 1
Ⅲ. x and y are prime integers.
(A) None
(B) Ⅰ only
(C) Ⅱonly
(D) Ⅲonly
(E) Ⅰand Ⅲ
I think ans is B but provided solution ia A........can anyone confirm

Answer is (A) only.

[ashishjha100]

I think its 420.

for a rectangle to form 4 lines should intersect ,ie 2 from 8 family and 2 from 6 family. So the toatal no: of rectangles become 8C2*6C2=420.

[ashishjha100]

Can anybody help.........

If x and y are integers and xy2 is a positive odd integer, which of the following must be true?
Ⅰ. xy is positive.
Ⅱ. xy is odd.
Ⅲ. x + y is even.
(A) Ⅰ only
(B) Ⅱ only
(C) Ⅲ only
(D) Ⅰ and Ⅱ
(E) Ⅱ and Ⅲ

[nikdo_19]

Originally Posted by ashishjha100

Can anybody help.........

If x and y are integers and xy2 is a positive odd integer, which of the following must be true?
Ⅰ. xy is positive.
Ⅱ. xy is odd.
Ⅲ. x + y is even.
(A) Ⅰ only
(B) Ⅱ only
(C) Ⅲ only
(D) Ⅰ and Ⅱ
(E) Ⅱ and Ⅲ

Can you confirm the question, is it "xy2 is a positive odd integer" or is it "(xy)2 is a positive odd interger"?