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GMAT Data Sufficiency Practice
- Some Interesting questions to test your DS & Quant concepts


Directions: Answer the questions based on the following information.
Each item has a question followed by two statements, I and II.

Choose A. If the question can be answered with the help of statement I alone but not statement II
alone
Choose B. If the question can be answered with the help of statement II alone but not statement I
alone
Choose C. If both, statement l and statement II are needed to answer the question, but neither of
them alone can answer
Choose D. If each statement Alone is sufficient
Choose E. If the question cannot be answered even with the help of both the statements




1.        What is the average weight of the three new team members who are recently included into
the team?

I.        The average weight of the team increases by 20 kg.
II.        The three new men substitute earlier members whose weights are 64 kg, 75 kg and 66 kg.

(a) A                (b) B                (c) C                (d) D                (e) E        


2.        If the selling price were to be increased by 10%, the sales would reduce by 10%. In what
ratio would the profits change?

I. The cost price remains constant.                II. The cost price increased by 10%.

(a) A                (b) B                (c) C                (d) D                (e) E        


3.        If 20 sweets are distributed among some boys and girls such that each girl gets 2 sweets
and each boy gets 3 sweets, what are the numbers of boys and girls?

I.         The number of girls is not more than 5.
II.        If each girl gets 3 sweets and each boy gets 2 sweets, the number of sweets required for
the children will still be the same.

(a) A                (b) B                (c) C                (d) D                (e) E        


4.        A and B undertake a work involving digging a ditch, alternately for a day each. If A can dig
a ditch in ‘a’ days and B can dig in ‘b’ days, will the work get done faster if A begins?

I.        For a positive integer n,   = 1.        II. b > a

(a) A                (b) B                (c) C                (d) D                (e) E        


5.        Is the distance from the office to home less than the distance from the cinema hall to
home?

I.         The time taken to travel from home to office is as much as the time taken from home to the
cinema hall, both distances being covered without stopping.
II. The road from the cinema hail to home is bad and speed reduces, as compared to that on the
road from home to the office.

(a) A                (b) B                (c) C                (d) D                (e) E   


6.        Is x + y – z + t even?

I. x + y + t is even.                        II. t and z are odd.

(a) A                (b) B                (c) C                (d) D                (e) E        


7.        What is the number x?

I. The LCM of x and 18 is 36.                II. The HCF of x and 18 is 2.

(a) A                (b) B                (c) C                (d) D                (e) E        


8.        What is the length of rectangle ABCD?

I. Area of the rectangle is 48 square units.        II. Length of the diagonal is 10 units.

(a) A                (b) B                (c) C                (d) D                (e) E        


9.        What is the first term of an arithmetic progression of positive integers?

I. Sum of the squares of the first and the second term is 116.
II. The fifth term is divisible by 7.

(a) A                (b) B                (c) C                (d) D                (e) E        


10.        What is the price of bananas?

I. With $ 84, 1 can buy 14 bananas and 35 oranges.
II. If price of bananas is reduced by 50%, then we can buy 48 bananas for $ 12

(a) A                (b) B                (c) C                (d) D                (e) E    




Answers

1.        (e) To calculate the average weight of the team of three newly recruited members we
require the total number of members in the team to calculate the total increase in weight of the
team. Hence, the questions cannot be answered even with the help of both the statements
together.


2.        (b)        Profit can be calculated as (S.P. – C.P.)   Sale, hence
Original profit = (S.P. – C.P.)   Sale
and new profit = (1.1 S.P. – C.P.)   0.9 Sale
Hence, from statement (I) ratio of profit =  
From here we cannot calculate ratio of profits
However, if we use statement (II) then ratio =  
Hence, statement (II) alone is sufficient to answer the question.

3.        (b)        Given 2G + 3B = 20. Now if we use statement (1) that number of girls is not more
than 5, then we have G = 1, B = 6 OR G = 4, B = 4. Since we cannot get a single solution from
this statement it is not sufficient to answer the question. If we use statement (II) 3B + 2G = 20 we
have G = 4 and B = 4.
Hence, statement (II) alone is sufficient to answer the question.


4.        (a) From statement (I)   now it is important to note here that n is an integer hence values of
a and b have to be assigned in such a way that n is an integer. It means that number of days in
which the entire work is to be finished should be an integer. Suppose if a = 2 and  b = 3 then
whosoever starts the work, number of days to complete the work would be same. If n is not an
integer, the situation would be entirely different. Hence, statement (I) alone is sufficient to answer
the question.


5.        (c)        From statement (I) alone we cannot compare the distance between office to home
with that of cinema hall to home because speed of both ways is not given. However in statement
(II) it is given that speed from cinema hail to home is less as compared to that of office to home.
Hence, we conclude that distance between home to cinema hall is more.


6.        (c)        From (I), if (x + y + t) is even, then (x + y + t) – z can be even or odd depending upon
whether z is even or odd. However if we know that z is odd, then (x +y + t) – z will always be odd.
Hence both the statements (I) and (II) are needed to answer the question.


7.        (c)        From (I) and (II)
LCM   HCF = First number   second number.
Hence required number =   = 4. Hence both the statements are required.


8.        (c)        From (I) we get L   B = 48. From (II) we get L2 + B2 = 100. Hence from (I) and (II)
we can find L (length) of the rectangle. Hence, both the statements are required to answer the
question.


9.        (a)        It is given in statement (I) that sum of squares of the first and second term is 116
and there exist two such numbers only 4 and 10 such that (4)2 + (10)2 = 116. Hence question can
be answered with the help of statement (I) alone.


10.        (b) From statement (II), it is very clear that the price of banana is (48/12 = $4). Hence,
question can be answered with the help of statement (II) alone.



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