GMAT Data Sufficiency Discussions

Hi Moderator

i am not able to post questions that include greater than sign, in this thread .no matter how many times i post ,it won't get pasted completely.even i am not able to paste questions copied from PDF files..Pls look into this matter,i am not able to use this thread properly,,@kinji.at.pg1 


From a drawer containing black, blue and gray solid-color socks, including at least three socks of each color, how many matched pairs can be removed?

(1) The drawer contains 11 socks.

(2) The drawer contains an equal number of black and gray socks.


A certain panel is to be composed of exactly three women and exactly two men, chosen from x women and y men. How many different panels can be formed with these constraints?

(1) If two more women were available for selection, exactly 56 different groups of three women could be selected.

(2) x = y + 1

Is a+b>c+d?

1. a>c

2.d lessthan b 

If R is an integer between 1 & 9, P - R = 2370, what is the value of R?
I. P is divisible by 4.
II. P is divisible by 9.

Please use DS options.


The average of three unequal quotations for a particular share is Rs.110. If all are quoted in integral
values of rupee, does the highest quotation exceed Rs.129?
I. The lowest quotation is Rs.100.
II. One of the quotations is Rs.115.

As the answer,
Mark (a), If the question can be answered with the help of statement I alone,
Mark (b), If the question can be answered with the help of statement II alone,
Mark (c), If both the statement I and statement II are needed to answer the question, and
Mark (d), If the question cannot be answered even with the help of both the statements.

A1, A2, A3 ...... A15.
In the sequence shown above, An = An-1 + k, where 2 ≤ n ≤ 15 and k is a non-zero constant. How many terms in the sequence are greater than 10?
(1) A1 = 24

(2) A8 = 10


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.

If ab ≠ 0 and points (-a, b) and (-b, a) are in the same quadrant of the xy-plane, is point (-x, y) in this same quadrant?

(1) xy > 0

(2) ax > 0


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.

This question is driving me crazy:

http://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/video/975

Why isn't the answer D? 

If x is an integer, what is the value of x?

1) 1/10 less than 1/(4x+2) less than 1/2

2) x^2 + 5x - 6 = 0

Answer:

http://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/video/989

I see why (2) is sufficient, but 1 is weird

If w, x and y are integers, are they consecutive integers?

1) When w+x+y is divided by 3, the remainder is 2

2) When wxy is divided by 3, the remainder is 1

Answer - http://www.gmatprepnow.com/module/gmat-integer-properties/video/850 

Any alternate solutions? 

What is the greatest common divisor of positive integers j and k?

1) The greatest common divisor of 3j and 2k is 2

2) The greatest common divisor of 5j and k is 10

Answer is here - http://www.gmatprepnow.com/module/gmat-integer-properties/video/857

Anyone have a different solution?

Set A:  {x, x, x, y, y, y, 3x+y, x-y}

If y > x > 0, what is the range of set A?

1) The median of set A is 10

2) The average (arithmetic mean) of set A is 9

Answer is here - http://www.gmatprepnow.com/module/gmat-statistics/video/818

Any other solutions? Is this question valid? It seems too hard. 

The average (arithmetic mean) N numbers is M. When the number x is removed, the average decreases by 3. What is the value of x? 

1) M + 3N = 21

2) N = 2M

Answer is here -

http://www.gmatprepnow.com/module/gmat-statistics/video/819 

I thought you need 2 equations with 2 unknowns

As i'm interested in FPM, I have decided to go for GMAT. My overall academic is 80% from 10th to Post graduation (M.Pharmacy).I am GATE qualified. I am 31.I have 2 years of work experience. But I have carreer gap of 2 years as I have a 2 year old. Currently workingworking in MNC. I want to know what are my chances of ending up in IIMs, if I manage a good GMAT score? Please comment. It would be a great help.

Thanks

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6 students p,q,r,s,t and u belong to three different sections of a class. Exactly 2 students belong to each section . they are made to stand in a row such that two students of the same section are not standing together . two of the possible arrangements are : p,q,r,s,t,u and q,s,u,t,p,r . Which of the following pairs, the two students cannot be from the same section? 1) p ,u 2) r,t 3) s,p 4) u,q

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