mathematics MCQs – Page 137

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 Review each marked answer and report any item that may be outdated or unclear.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

2721. There are four prime numbers written in ascending order of magnitude. The product of the first three is 385 and of the last three is 1001. Find the fourth number?
0

A. 11

B. 7

C. 5

D. 13

2722. Find the lowest 4-digit number which when divided by 3, 4 or 5 leaves a remainder of 2 in each case?
0

A. 1030

B. 1022

C. 1020

D. 1026

2723. The wheels revolve round a common horizontal axis. They make 15, 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?
0

A. 2 min

B. None

C. 3 min

D. 1 min

2724. LCM of 455, 117, 338 is________?
0

A. 107470

B. 104670

C. 106470

D. 10670

2725. Find the greatest number of four digits which when divided by 10, 15, 21 and 28 leaves 4, 9, 15 and 22 as remainders respectively?
0

A. 9666

B. 9864

C. 9654

D. 9664

2726. Greatest Common Divisor of two numbers is 8 while their Least Common Multiple is 144. Find the other number if one number is 16.
0

A. 96

B. 36

C. 72

D. 108

2727. Find the size of the largest square slabs which can be paved on the floor of a room 5 meters 44 cm long and 3 meters 74 cm broad?
0

A. 38

B. 34

C. 56

D. 42

2728. The H.C.F of two numbers is 8. Which of the following can never be their L.C.M?
0

A. 56

B. 60

C. 48

D. 24

2729. The L.C.M of two numbers is 48. The numbers are in the ratio 2:3. The sum of numbers is__________?
0

A. 40

B. 64

C. 32

D. 28

2730. The H.C.F and L.C.M of two numbers are 84 and 21 respectively. If the ratio of the two numbers is 1:4, then the larger of the two numbers is____________?
0

A. 84

B. 48

C. 108

D. 12

2731. Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is________?
0

A. 89

B. 81

C. 85

D. 75

2732. The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is_________?
0

A. 305

B. 235

C. 127

D. 123

2733. The least number of four digits which is divisible by 15, 25, 40 and 75 is_________?
0

A. 9800

B. 9400

C. 9600

D. 9000

2734. What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30?
0

A. 2520

B. 630

C. 1260

D. 196

2735. The H.C.F of two numbers is 11 and their L.C.M is 7700. If one of the numbers is 275, then the other is__________?
0

A. 279

B. 308

C. 283

D. 318

2736. The least number of four digits which is divisible by 4, 6, 8 and 10 is_________?
0

A. 1080

B. 1095

C. 1085

D. 1075

2737. A man can row at 5 km/hr in still water, if the river is running at 1 km/hr it takes him 75 minutes to row to a place and back. How far is the place?
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A. 5 km

B. 4 km

C. 2.5km

D. 3km

2738. A boat running upstream takes 8 hours 48 min to cover a certain distance while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and the speed of water current respectively?
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A. Cannot be determined

B. 2:01

C. 8 : 3

D. 3:01

2739. A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
0

A. 1 hr 15 min

B. 1 hour

C. 1 hr 30 min

D. 40 minutes

2740. A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it takes him 1 hour to row to a place and black. How far is the place?
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A. 3.12 km

B. 3 km

C. 2.88 km

D. 2 km

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