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

Total Questions: 50

1. Calculate the least whole number, which when subtracted from both the terms of the ratio 5 : 6 gives a ratio less than 17 : 22. [RRB NTPC 11/01/2021 (Morning)]

Correct Answer: (c) 2
Solution:

2. Ram Sagar and Bhagat Ram enter into a partnership by investing in the ratio 10 : 13. Find Bhagat Ram’s share in a profit of Rs. 8,050. [RRB NTPC 11/01/2021 (Evening)]

Correct Answer: (a) Rs. 4,550
Solution:

Bhagat Ram’s share 13/23 × 8050 = Rs 4,550

3. Anita and Vinnet divide an amount of Rs. 1,950 between themselves in the ratio 6 : 7. If an amount of Rs. 100 is added to each of their shares, what will be the new ratio of their shares? [RRB NTPC 11/01/2021 (Evening)]

Correct Answer: (a) 20 : 23
Solution:

4. If we increase 50% of the numerator and 80% of the denominator of a fraction, then what fraction of the original will be the new fraction? [RRB NTPC 12/01/2021 (Morning)]

Correct Answer: (c) 5/6
Solution:

5. If A : B = 3 : 5 and B : C = 4 : 7,then the value of A : B : C is : [RRB NTPC 12/01/2021 (Evening) ]

Correct Answer: (d) 12 : 20 : 35
Solution:

6. In a college, if 15% of the boys are the same in number as one - third of the girls, then find the ratio of the number of boys to that of girls in the college. [RRB NTPC 13/01/2021 (Evening) ]

Correct Answer: (c) 20 : 9
Solution:

7. If a = 3/7 b, then the value of (8a − b) / (2a + 3b) is: [RRB NTPC 16/01/2021 (Evening)]

Correct Answer: (d) 17/27
Solution:

8. If we increase 50% of numerator and 80% of denominator of a fraction, then what fraction of the original will be the new fraction? [RRB NTPC 17/01/2021 (Morning)]

Correct Answer: (b) 5/6
Solution:

9. The ratio of income of Aamir to that of Ali is 5 : 3 and they expend in the ratio of 9 : 5 respectively. If Aamir saves Rs. 2,600 and Ali saves Rs. 1,800, then their respective incomes are: [RRB NTPC 17/01/2021 (Morning)]

Correct Answer: (a) Rs. 8000 : Rs. 4800
Solution:

10. Two numbers are in the ratio 2 : 3; if 20 is added to 20% of the smaller number, it will be equal to 10% of the larger number plus 25. The smaller number is________. [RRB NTPC 17/01/2021 (Evening)]

Correct Answer: (a) 100
Solution: