Ratio & Proportion (Railway Maths) (Part – I)

Total Questions: 50

41. The numerator of a fraction is 2 less than the denominator. If the numerator is multiplied by 2 and the denominator is multiplied by 3, then the fraction becomes 2/9. The fraction is : [NTPC CBT - I 28/12/2020 (Evening)]

Correct Answer: (d) 1/3
Solution:

42. A man invested 1/2 of his capital at 5% rate of interest per annum, 1/3 of his capital at 8% per annum and the remaining at 10% rate of interest per annum. His total income from the three investments is Rs. 820.00 in a year. The total capital invested is : [NTPC CBT - I 28/12/2020 (Evening)]

Correct Answer: (d) Rs. 12000.00
Solution:

43. Three persons are invested an amount of money in a business in the ratio 1/2 : 1/3 : 1/4. At the end of a year, the total profit was Rs. 15600. The largest share received in profit will be: [NTPC CBT - I 28/12/2020 (Evening) ]

Correct Answer: (a) Rs.7200
Solution:

44. The product of three numbers is 10290 and the numbers are in the ratio of 3 : 5 : 2. The greatest number among the three numbers is : [NTPC CBT - I 29/12/2020 (Evening)]

Correct Answer: (b) 35
Solution:

45. Four fifths of a number is 12 more than three fourths of the number. Find the number. [NTPC CBT - I 30/12/2020 (Evening)]

Correct Answer: (b) 240
Solution:

46. The sum of two numbers is 25 and their difference is 15. The ratio of the numbers is : [NTPC CBT - I 04/01/2021 (Morning)]

Correct Answer: (a) 4 : 1
Solution:

47. An airplane is carrying 500 passengers, of which 45% are men and 20% are children. The ratio of the number of men, women and children in the lowest terms is : [NTPC CBT - I 05/01/2021 (Morning) ]

Correct Answer: (c) 9 : 7 : 4
Solution:

48. x and y vary directly with each other. When x is 10, y is 15. Which of the following is NOT a pair of corresponding values of x and y ? [NTPC CBT - I 05/01/2021 (Evening) ]

Correct Answer: (c) 15, 20
Solution:

49. The difference between two numbers is 5. If 25 is subtracted from the smaller number and 20 is added to the greater number the ratio becomes 1 : 2. What is the greater number ? [NTPC CBT - I 08/01/2021 (Morning)]

Correct Answer: (c) 80
Solution:

50. In an election the votes cast for two candidates were in the ratio 2 : 9. If the successful candidate received 984321 votes, find the total votes polled. [NTPC CBT - I 08/01/2021 (Evening)]

Correct Answer: (a) 1203059
Solution: