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

Total Questions: 50

11. The ratio of the income of A to B is 5 : 4, and the ratio of their respective expenditure is 3 : 2. If, at the end of the year, each saves Rs. 1600 , then the income of A is. [RRB NTPC 14/03/2021 (Evening) ]

Correct Answer: (c) Rs. 4000
Solution:

12. Divide Rs.1,162 among A , B and C in the ratio of 35 : 28 : 20. [RRB NTPC 14/03/2021 (Evening) ]

Correct Answer: (b) A = Rs.490 , B = Rs.392 and C = Rs.280
Solution:

13. If p : q = 9 : 2, then find the ratio (4p + 7q) : (4p − 7q). [RRB NTPC 15/03/2021 (Morning)]

Correct Answer: (c) 25 : 11
Solution:

14. If A : B = 2 : 3, B : C = 2 : 3 and C : D = 3 : 4, then A : D = ? [RRB NTPC 15/03/2021 (Evening)]

Correct Answer: (c) 1 : 3
Solution:

15. 40% of the first number is 12 and 50% of the second number is 24. The ratio of the first number to the second number is: [RRB NTPC 15/03/2021 (Evening)]

Correct Answer: (d) 5 : 8
Solution:

16. The ratio of three positive numbers is 1 : 3 : 4 and the sum of their squares is 2106. What is the largest of these three numbers ? [RRB NTPC 19/03/2021 (Morning) ]

Correct Answer: (a) 36
Solution:

17. Rs. 2430 is divided among three persons A, B and C such that if their shares are diminished by Rs. 5, Rs.10 and Rs. 15 respectively, the remainders shall be in the ratio 3 : 4 : 5. Find the share of C. [RRB NTPC 21/03/2021 (Morning) ]

Correct Answer: (c) Rs.1015
Solution:

18. Mohit has an amount of Rs.13,000 in the denominations of ten-rupee notes, twenty-rupee notes, fifty-rupee notes and five-hundred-rupee notes. The number of five-hundred-rupee notes is 25% of the number of ten-rupee notes. The number of fifty-rupee notes is 50% of the number of ten - rupee notes.The number of twenty-rupee is 50% of the number of five-hundred -rupee notes. What is the total number of notes that Mohit has? [RRB NTPC 21/03/2021 (Morning) ]

Correct Answer: (b) 150
Solution:

19. The total number of gold medals and silver medals won by a person in games is 75. Which of the following CANNOT be the ratio of the number of silver medals won to that of gold medals won by that person ? [RRB NTPC 21/03/2021 (Evening) ]

Correct Answer: (c) 9 : 1
Solution:

9 + 1 = 10
Number of medals is in the whole number and 75 is not divisible by 10, so 9:1 can not be the ratio of gold and silver medal.

20. The incomes of A and B are in the ratio 3:2 and their expenditures are in the ratio 5 : 3. If each saves Rs. 2,000, what will be the difference between their incomes ? [RRB NTPC 27/03/2021 (Morning) ]

Correct Answer: (a) Rs. 4,000
Solution: