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Quantitative Section : GMAT Sample Problem Solving Ability

Directions: Solve each gmat sample quantitative ability problem and indicate the best of the answer choices given..

Numbers: All numbers used are real numbers.

Figures: A figure accompanying a gmat sample quantitatove ability problem solving question is intended to provide information useful in solving the problem. Figures are drawn as accurately as possible EXCEPT when it is stated in a specific problem that its figure is not drawn to scale. straight line may sometimes appear jagged. All figures lie on a plane unless otherwise indicated.

Following are some gmat sample quantitative ability questions.

  1. A rectangle is 14 cm long and 10 cm wide. If the length is reduced by x cms and its width is increased also by x cms so as to make it a square then its area changes by :
    1. 4
    2. 144
    3. 12
    4. 2
    5. None of the above.

    Ans : A

  2. A motorcycle stunts man belonging to a fair, rides over the vertical walls of a circular well at an average speed of 54 kph for 5 minutes. If the radius of the well is 5 meters then the distance traveled is:
    1. 2.5 kms
    2. 3.5 kms
    3. 4.5 kms
    4. 5.5 kms
    5. None of the above

    Ans : C

  3. If 1 cm on a map corresponds to an actual distance of 40 kms. And the distance on the map between Bombay and Calcutta is 37.5 cms., the actual distance between them is :
    1. 375 kms
    2. 3750 kms
    3. 1500 kms
    4. 1375 kms
    5. None of the above

    Ans : C

  4. A box contains 90 mts each of 100 gms and 100 bolts each of 150 gms. If the entire box weighs 35.5 kg., then the weight of the empty box is :
    1. 10 kg
    2. 10.5 kg
    3. 11 kg
    4. 11.5 kg
    5. None of the above

    Ans : D

  5. If the radius of a circle is increased by 20% then the area is increased by :
    1. 44%
    2. 120%
    3. 144%
    4. 40%
    5. None of the above

    Ans : A

  6. Tom, Dick and Harry went for lunch to a restaurant. Tom had $100 with him, Dick had $60 and Harry had $409. They got a bill for $104 and decided to give a tip of $16. They further decided to share the total expenses in the ratio of the amounts of money each carried. The amount of money which Tom paid more than what Harry paid is
    1. 120
    2. 200
    3. 60
    4. 24
    5. 36

    Ans : E

  7. A plot of land is in the shape of a trapezium whose dimensions are given in the figure below :

    Hence the perimeter of the field is
    1. 50 m
    2. 64 m
    3. 72 m
    4. 84 m
    5. None of the above

    Ans : c

  8. Four concentric ( having the same center ) circles with radii, x, 2x, 3x and 4x are drawn to form two rings A and B as shown in the figure.

    Ratio of the area of inner ring A to the area of outer ring B is
    1. 1 : 2
    2. 1 : 4
    3. 2 : 3
    4. 3 : 7
    5. None of the above

    Ans : D

  9. If 3/p = 6 and 3/q = 15 then p - q = ?
    1. 1/3
    2. 2/5
    3. 3/10
    4. 5/6
    5. None of the above

    Ans : C

  10. A father is three times as old as his son. After fifteen years the father will be twice as old as his son's age at that time. Hence the father's present age is
    1. 36
    2. 42
    3. 45
    4. 48
    5. None of the above

    Ans : C

  1. If .2t = 2.2 - .6s and .5s = .2t + 1.1, then s =
    1. 1
    2. 3
    3. 10
    4. 11
    5. 30

    Ans : B

  2. Five years ago, Beth's age was three times that of Amy. Ten years ago, Beth's age was one half that of Chelsea. If C repre- sents Chelsea's current age, which of the following represents Amy's current age?
    1. c/6 + 5
    2. 2c
    3. (c-10)/3
    4. 3c-5
    5. 5c/3 - 10

    Ans : A

  3. A portion of $7200 is invested at a 4% annual return, while the remainder is invested at a 5% annual return. If the annual income from both portions is the same, what is the total income from the two investments?
    1. $160
    2. $320
    3. $400
    4. $720
    5. $1,600

    Ans : B

  4. An empty swimming pool can be filled to capacity through an inlet pipe in 3 hours, and it can be completely drained by a drainpipe in 6 hours. If both pipes are fully open at the same time, in how many hours will the empty pool be filled to capacity?
    1. 4
    2. 4.5
    3. 5
    4. 5.5
    5. 6

    Ans : E

  5. If r = (3p + q)/2 and s = p - q, for which of the following values of p would r2 = s2?
    1. 1q/5
    2. 10 - 3q/2
    3. q - 1
    4. 3q
    5. 9q/2 - 9

    Ans : A

  6. At 10 a.m. two trains started traveling toward each other from stations 287 miles apart. They passed each other at 1:30 p.m. the same day. If the average speed of the faster train exceeded the average speed of the slower train by 6 miles per hour, which of the following represents the speed of the faster train, in miles per hour?
    1. 38
    2. 40
    3. 44
    4. 48
    5. 50

    Ans : C

  7. On the xy-coordinate plane, points A and B both lie on the circumference of a circle whose center is O, and the length of AB equals the circle's diameter. If the (x,y) coordinates of O are (2,1) and the (x,y) coordinates of B are (4,6), what are the (x,y) coordinates of A?
    1. (3, 3/2)
    2. (1, 2/2)
    3. (0, -4)
    4. (2/2, 1)
    5. (-1, -2/2)

    Ans : C

  8. If a rectangle's length and width are both doubled, by what percent is the rectangle's area increased?
    1. 50
    2. 100
    3. 200
    4. 300
    5. 400

    Ans : D

  9. A rectangular tank 10" by 8" by 4" is filled with water. If all of the water is to be transferred to cube-shaped tanks, each one 3 inches on a side, how many of these smaller tanks are needed?
    1. 9
    2. 12
    3. 16
    4. 21
    5. 39

    Ans : B

  10. Point Q lies at the center of the square base (ABCD) of the pyramid pictured above. The pyramid's height (PQ) measures exactly one half the length of each edge of its base, and point E lies exactly halfway between C and D along one edge of the base. What is the ratio of the surface area of any of the pyramid's four triangular faces to the surface area of the shaded triangle?
    1. 3 :√2
    2. √5:1
    3. 4√3:3
    4. 2√2:1
    5. 8:√5

    Ans : D

Average

  1. The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs.90 per day. During the first 7 days, his average wages was Rs.87/day and the average wages during the last 7 days was Rs.92 /day. What was his wage on the 8th day?
    1. 83
    2. 92
    3. 90
    4. 97

    Ans : D

  2. The average of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers?
    1. 6.5
    2. 4
    3. 3
    4. 3.5

    Ans : C

  3. The average temperature on Wednesday, Thursday and Friday was 250. The average temperature on Thursday, Friday and Saturday was 240. If the temperature on Saturday was 270, what was the temperature on Wednesday?
    1. 240
    2. 210
    3. 270
    4. 300

    Ans : D

  4. The average age of a group of 12 students is 20years. If 4 more students join the group, the average age increases by 1 year. The average age of the new students is
    1. 24
    2. 26
    3. 23
    4. 22

    Ans : A

  5. When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?
    1. 57 kgs
    2. 56.8 kgs
    3. 58.2 kgs
    4. 52.2 kgs

    Ans : A

  6. Three math classes: X, Y, and Z, take an algebra test.
    The average score in class X is 83.
    The average score in class Y is 76.
    The average score in class Z is 85.
    The average score of all students in classes X and Y together is 79.
    The average score of all students in classes Y and Z together is 81.

    What is the average for all the three classes?

    1. 81
    2. 81.5
    3. 82
    4. 84.5

    Ans : B

  7. The average weight of a class of 24 students is 36 years. When the weight of the teacher is also included, the average weight increases by 1kg. What is the weight of the teacher?
    1. 60 kgs
    2. 61 kgs
    3. 37 kgs
    4. None of these

    Ans : B

  8. The average of 5 quantities is 10 and the average of 3 of them is 9. What is the average of the remaining 2?
    1. 11
    2. 12
    3. 11.5
    4. 12.5

    Ans : C

  9. The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member?
    1. 13.5
    2. 14
    3. 15
    4. 12.5

    Ans : D

  10. A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?
    1. 8
    2. 6
    3. 2
    4. 4

    Ans : C

  11. Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total cost of 24 apples and 24 mangoes.
    1. 1044
    2. 2088
    3. 720
    4. 324

    Ans : B

Interest

  1. A father left a will of Rs.35 lakhs between his two daughters aged 8.5 and 16 such that they may get equal amounts when each of them reach the age of 21 years. The original amount of Rs.35 lakhs has been instructed to be invested at 10% p.a. simple interest. How much did the elder daughter get at the time of the will?
    1. Rs. 17.5 lakhs
    2. Rs. 21 lakhs
    3. Rs. 15 lakhs
    4. Rs. 20 lakhs

    Ans : B

  2. What will Rs.1500 amount to in three years if it is invested in 20% p.a. compound interest, interest being compounded annually?
    1. 2400
    2. 2592
    3. 2678
    4. 2540

    Ans : B

  3. If a sum of money grows to 144/121 times when invested for two years in a scheme where interest is compounded annually, how long will the same sum of money take to treble if invested at the same rate of interest in a scheme where interest is computed using simple interest method?
    1. 9 years
    2. 22 years
    3. 18 years
    4. 33 years

    Ans : B

  4. The population of a town was 3600 three years back. It is 4800 right now. What will be the population three years down the line, if the rate of growth of population has been constant over the years and has been compounding annually?
    1. 6000
    2. 6400
    3. 7200
    4. 9600

    Ans : B

  5. A man invests Rs.5000 for 3 years at 5% p.a. compound interest reckoned yearly. Income tax at the rate of 20% on the interest earned is deducted at the end of each year. Find the amount at the end of the third year.
    1. 5624.32
    2. 5630.50
    3. 5788.125
    4. 5627.20

    Ans : A

  6. The difference between the compound interest and the simple interest on a certain sum at 12% p.a. for two years is Rs.90. What will be the value of the amount at the end of 3 years?
    1. 9000
    2. 6250
    3. 8530.80
    4. 8780.80

    Ans : D

  7. Vijay invested Rs.50,000 partly at 10% and partly at 15%. His total income after a year was Rs.7000. How much did he invest at the rate of 10%?
    1. Rs.40,000
    2. Rs.40,000
    3. Rs.12,000
    4. Rs.20,000

    Ans : B

  8. A sum of money invested for a certain number of years at 8% p.a. simple interest grows to Rs.180. The same sum of money invested for the same number of years at 4% p.a. simple interest grows to Rs.120 only. For how many years was the sum invested?
    1. 25 years
    2. 40 years
    3. 33 years and 4 months
    4. Cannot be determined

    Ans : A

  9. How long will it take for a sum of money to grow from Rs.1250 to Rs.10,000, if it is invested at 12.5% p.a simple interest?
    1. 8 years
    2. 64 years
    3. 72 years
    4. 56 years

    Ans : D

  10. Rs. 5887 is divided between Shyam and Ram, such that Shyam's share at the end of 9 years is equal to Ram's share at the end of 11 years, compounded annually at the rate of 5%. Find the share of Shyam.
    1. 2088
    2. 2000
    3. 3087
    4. None of these

    Ans : C

Geometry

  1. Find the coordinates of the point which divides the line joining (5, -2) and (9, 6) internally in the ratio 1 : 3.
    1. (6, 0)
    2. (6, 3)
    3. (0, 6)
    4. (3, 6)

    Ans : A

  2. Find the number of triangles in an octagon.
    1. 326
    2. 120
    3. 56
    4. Cannot be determined

    Ans : C

  3. Find the equation of a line whose intercepts are twice of the line 3x - 2y - 12 = 0
    1. 3x - 2y = 24
    2. 2x - 3y = 12
    3. 2x - 3y = 24
    4. None of these

    Ans : A

  4. Find the area of the sector covered by the hour hand after it has moved through 3 hours and the length of the hour hand is 7cm.
    1. 77 sq.cm
    2. 38.5 sq.cm
    3. 35 sq.cm
    4. 70 sq.cm

    Ans : B

  5. Find the area of the triangle whose vertices are (-6, -2), (-4, -6), (-2, 5).
    1. 36
    2. 18
    3. 15
    4. 30

    Ans : C

  6. A stairway 10ft high is such that each step accounts for half a foot upward and one-foot forward. What distance will an ant travel if it starts from ground level to reach the top of the stairway?
    1. 30 ft
    2. 33 ft
    3. 10 ft
    4. 29 ft

    Ans : D

  7. Each interior angle of a regular polygon is 120 degrees greater than each exterior angle. How many sides are there in the polygon?
    1. 6
    2. 8
    3. 12
    4. 3

    Ans : C

  8. What is the area of the largest triangle that can be fitted into a rectangle of length 'l' units and width 'w' units?
    1. lw/3
    2. (2lw)/3
    3. (3lw)/4
    4. (lw)/2

    Ans : D

  9. Which of the following is inCorrect?
    1. An incentre is a point where the angle bisectors meet.
    2. The median of any side of a triangle bisects the side at right angle.
    3. The point at which the three altitudes of a triangle meet is the orthocentre
    4. The point at which the three perpendicular bisectors meet is the centre of the circumcircle.

    Ans : B

  10. A and B are two points with the co-ordinates (-2, 0) and (0, 5). What is the length of the diagonal AC if AB form one of the sides of the square ABCD?
    1. units
    2. units
    3. units
    4. units

    Ans : B

Menstruation

  1. A 5 cm cube is cut into as many 1 cm cubes as possible. What is the ratio of the surface area of the larger cube to that of the sum of the surface areas of the smaller cubes?
    1. 1 : 6
    2. 1 : 5
    3. 1 : 25
    4. 1 : 125

    Ans : B

  2. If the sides of a triangle measure 72, 75 and 21, what is the measure of its in radius?
    1. 37.5
    2. 24
    3. 9
    4. 15

    Ans : C

  3. The circumference of the front wheel of a cart is 30 ft long and that of the back wheel is 36 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel?
    1. 20 ft
    2. 25 ft
    3. 750 ft
    4. 900 ft

    Ans : D

  4. The area of a square field is 24200 sq m. How long will a lady take to cross the field diagonally at the rate of 6.6 km/hr?
    1. 3 minutes
    2. 2 minutes
    3. 2.4 minutes
    4. 2 minutes 40 seconds

    Ans : B

Ratio And Proportion

  1. Rs.432 is divided amongst three workers A, B and C such that 8 times A's share is equal to 12 times B's share which is equal to 6 times C's share. How much did A get?
    1. Rs.192
    2. Rs.133
    3. Rs.144
    4. Rs.128

    Ans : C

  2. If 20 men or 24 women or 40 boys can do a job in 12 days working for 8 hours a day, how many men working with 6 women and 2 boys take to do a job four times as big working for 5 hours a day for 12 days?
    1. 8 men
    2. 12 men
    3. 2 men
    4. 24 men

    Ans : C

  3. Two cogged wheels of which one has 32 cogs and other 54 cogs, work into each other. If the latter turns 80 times in three quarters of a minute, how often does the other turn in 8 seconds?
    1. 48
    2. 135
    3. 24
    4. None of these

    Ans : C

  1. The monthly incomes of A and B are in the ratio 4 : 5, their expenses are in the ratio 5 : 6. If 'A' saves Rs.25 per month and 'B' saves Rs.50 per month, what are their respective incomes?
    1. Rs.400 and Rs.500
    2. Rs.240 and Rs.300
    3. Rs.320 and Rs.400
    4. Rs.440 and Rs.550

    Ans : A

  2. The proportion of milk and water in 3 samples is 2:1, 3:2 and 5:3. A mixture comprising of equal quantities of all 3 samples is made. The proportion of milk and water in the mixture is
    1. 2:1
    2. 5:1
    3. 99:61
    4. 227:133

    Ans : D

  3. A group of workers can do a piece of work in 24 days. However as 7 of them were absent it took 30 days to complete the work. How many people actually worked on the job to complete it?
    1. 35
    2. 30
    3. 28
    4. 42

    Ans : C

  4. A, B and C play cricket. A's runs are to B's runs and B's runs are to C's as 3:2. They get altogether 342 runs. How many runs did A make?
    1. 162
    2. 108
    3. 72
    4. None of these

    Ans : A

  5. The monthly salaries of two persons are in the ratio of 4:7. If each receives an increase of Rs.25 in the salary, the ratio is altered to 3: 5. Find their respective salaries.
    1. 120 and 210
    2. 80 and 140
    3. 180 and 300
    4. 200 and 350

    Ans : D

  6. A fort has provisions for 60 days. If after 15 days 500 men strengthen them and the food lasts 40 days longer, how many men are there in the fort?
    1. 3500
    2. 4000
    3. 6000
    4. None of these

    Ans : B

  7. The ratio of marks obtained by vinod and Basu is 6:5. If the combined average of their percentage is 68.75 and their sum of the marks is 275, find the total marks for which exam was conducted.
    1. 150
    2. 200
    3. 400
    4. None of these.

    Ans : B

  8. The present ages of A and B are as 6 : 4. Five years ago their ages were in the ratio 5 : 3. Find their present ages.
    1. 42, 28
    2. 36, 24
    3. 30, 20
    4. 25, 15

    Ans : C

  9. A, B and C enter into a partnership by investing Rs.3600, Rs.4400 and Rs.2800. A is a working partner and gets a fourth of the profit for his services and the remaining profit is divided amongst the three in the rate of their investments. What is the amount of profit that B gets if A gets a total of Rs. 8000?
    1. 4888.88
    2. 9333.33
    3. 4000
    4. 3666.66

    Ans : A

  10. A, B and C, each of them working alone can complete a job in 6, 8 and 12 days respectively. If all three of them work together to complete a job and earn Rs.2340, what ill be C's share of the earnings?
    1. Rs.520
    2. Rs.1080
    3. Rs.1170
    4. Rs.630

    Ans : A

Mixtures and Alligations

  1. A 20 litre mixture of milk and water contains milk and water in the ratio 3 : 2. 10 litres of the mixture is removed and replaced with pure milk and the operation is repeated once more. At the end of the two removal and replacement, what is the ratio of milk and water in the resultant mixture?
    1. 17 : 3
    2. 9 : 1
    3. 3 : 17
    4. 5 : 3

    Ans : B

  2. In what ratio must a person mix three kinds of tea costing Rs.60/kg, Rs.75/kg and Rs.100 /kg so that the resultant mixture when sold at Rs.96/kg yields a profit of 20%?
    1. 1 : 2 : 4
    2. 3 : 7 : 6
    3. 1 : 4 : 2
    4. None of these

    Ans : C

  3. A merchant mixes three varieties of rice costing Rs.20/kg, Rs.24/kg and Rs.30/kg and sells the mixture at a profit of 20% at Rs.30 / kg. How many kgs of the second variety will be in the mixture if 2 kgs of the third variety is there in the mixture?
    1. 1 kg
    2. 5 kgs
    3. 3 kgs
    4. 6 kgs

    Ans : B

  4. How many litres of water should be added to a 30 litre mixture of milk and water containing milk and water in the ratio of 7 : 3 such that the resultant mixture has 40% water in it?
    1. 7 litres
    2. 10 litres
    3. 5 litres
    4. None of these

    Ans : C

  5. How many kgs of Basmati rice costing Rs.42/kg should a shopkeeper mix with 25 kgs of ordinary rice costing Rs.24 per kg so that he makes a profit of 25% on selling the mixture at Rs.40/kg?
    1. 20 kgs
    2. 12.5 kgs
    3. 16 kgs
    4. 200 kgs

    Ans : A

  6. How many litres of a 12 litre mixture containing milk and water in the ratio of 2 : 3 be replaced with pure milk so that the resultant mixture contains milk and water in equal proportion?
    1. 4 litres
    2. 2 litres
    3. 1 litre
    4. 1.5 litres

    Ans : B

  7. A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal proportions. What is the value of x?
    1. 6 litres
    2. 10 litres
    3. 30 litres
    4. None of these

    Ans : B

  8. A zookeeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be 260. If the zoo had either pigeons or horses, how many horses were there in the zoo?
    1. 40
    2. 30
    3. 50
    4. 60

    Ans : C

  9. From a cask of milk containing 30 litres, 6 litres are drawn out and the cask is filled up with water. If the same process is repeated a second, then a third time, what will be the number of litres of milk left in the cask?
    1. 0.512 liters
    2. 12 liters
    3. 14.38 liters
    4. 15.36 liters

    Ans : D

  10. In a km race, A gives B a start of 20 seconds and beats him by 40m. However, when he gives B a start of 25 seconds they finish in a dead heat. What is A's speed in m/sec?
    1. 12.5 m/sec
    2. 20 m/sec
    3. 8 m/sec
    4. 10 m/sec

    Ans : D

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