mathematics MCQs – Page 78

Practise multiple-choice questions from mathematics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

mathematics Mcqs

1541. A person travels from x to y at a speed of 40Km/h and returns by increasing his speed 50%. What is his average speed for both the trips?
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A. 48km/h

B. 45km/h

C. 50km/h

D. 36km/h

1542. Find the lowest 4-digit number which when divided by 3, 4 or 5 leaves a remainder of 2 in each case?
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A. 1020

B. 1030

C. 1022

D. 1026

1543. Two pipes A and B can separately fill a tank in 2 minutes and 15 minutes respectively. Both the pipes are opened together but 4 minutes after the start the pipe A is turned off. How much time will it take to fill the tank?
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A. 12 min

B. 9 min

C. 10 min

D. 11 min

1544. The area of a square is equal to five times the area of a rectangle of dimensions 125 cm * 64 cm. What is the perimeter of the square?
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A. 400 cm

B. 600 cm

C. 1000 cm

D. 800 cm

1545. Pipe A can fill a tank in 16 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes?
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A. 20

B. 23

C. 24

D. None of these

1546. The areas of the two spheres are in the ratio 1: 4. The ratio of their volume is?
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A. 0.086111111

B. 1:16

C. 1:04

D. 1:8

1547. Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
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A. 50 min

B. 25 min

C. 12 min

D. 15 min

1548. The dimensions of a room are 25 feet * 15 feet * 12 feet. What is the cost of white washing the four walls of the room at Rs. 5 per square feet if there is one door of dimensions 6 feet * 3 feet and three windows of dimensions 4 feet * 3 feet each?
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A. Rs. 3600

B. Rs. 4800

C. Rs. 4530

D. Rs. 3560

1549. Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank?
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A. 11 min 45 sec

B. 12 min 30 sec

C. 10 min 20 sec

D. 14 min 40 sec

1550. If six persons sit in a row, then the probability that three particular persons are always together is____________?
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A. 10-Mar

B. 20-Jan

C. 5-Apr

D. 1/5

1551. If the volumes of two cubes are in the ratio 8: 1, the ratio of their edges is_________?
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A. None of these

B. 8:01

C. 2 : 1

D. 2?2 : 1

1552. A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If four marbles are picked at random, what is the probability that none is blue?
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A. 65/91

B. 33/91

C. 51/91

D. 17/91

1553. If the sides of a triangle are 26 cm, 24 cm and 10 cm, what is its area?
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A. 315 cm2

B. 120 cm2

C. 312 cm2

D. 130 cm2

1554. (i). a<sup>2
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A. If a > b

B. If the relationship between a and b cannot be established

C. If a < b

D. If a ? b

1555. I. x<sup>2
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A. If x ? y

B. If x < y

C. If x > y

D. If x ? y

1556. Find the greatest number that, while dividing 47, 215 and 365, gives the same remainder in each case?
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A. 4

B. 5

C. 6

D. 3

1557. If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is__________?
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A. 13-May

B. 19/52

C. 4/13

D. 17/52

1558. What are the chances that no two boys are sitting together for a photograph if there are 5 girls and 2 boys?
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A. 7-Apr

B. 5/7

C. 21-Jan

D. 7-Feb

1559. An order was placed for the supply of a carpet whose breadth was 6 m and length was 1.44 times the breadth. What be the cost of a carpet whose length and breadth are 40% more and 25% more respectively than the first carpet. Given that the ratio of carpet is Rs. 45 per sq m?
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A. Rs. 4082.40

B. Rs. 3642.40

C. Rs. 4216.20

D. Rs. 3868.80

1560. Find the roots of quadratic equation: 3x<sup>2
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A. 3, -2/3

B. -6, 3

C. -9, 2

D. -5, 2

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