Mathematics Quiz For RRB NTPC : 12th February For Ratio & Proportion

Q1. Rs 730 were divided among A, B, C in such a way that if A gets Rs 3 then B gets Rs 4 and if B gets Rs 3.50 then C gets Rs 3. The share of B exceeds that of C by
(a) Rs 30
(b) Rs 40
(c) Rs 70
(d) Rs 210

Q2. The compound ratio of the inverse ratios of the ratios x : yz, y : zx, z : xy is:
(a) 1 : xyz
(b) xyz : 1
(c) 1 : 1
(d) x : yz

Q3. Rs. 2420 were divided among A, B, C, so that A : B = 5 : 4 and B : C = 9 : 10 then C gets
(a) 680
(b) 800
(c) 900
(d) 950

Q4. 49 kg of blended tea contain Assam and Darjeeling tea in the ratio 5 : 2 then the quantity of Darjeeling tea is to be added to the mixture to make the ratio of Assam to Darjeeling tea 2 : 1 is
(a) 4.5 kg
(b) 3.5 kg
(c) 5 kg
(d) 6 kg

Q5. Among 132 examinees of a certain school, the ratio of successful to unsuccessful students is 9 : 2, Had 4 more students passed, then the ratio of successful to unsuccessful students will be
(a) 14 : 3
(b) 14 : 5
(c) 28 : 3
(d) 28 : 5

Q6. In a regiment the ratio between the number of officers to soldiers was 3 : 31 before. In a battle 6 officers and 22 soldiers were killed and the ratio became 1 : 13, the number of officers in the regiment before battle was
(a) 31
(b) 38
(c) 21
(d) 28

Q7. Three containers have their volumes in the ratio 3 : 4 : 5. They are full of mixtures of milk and water. The mixtures contain milk and water in the ratio of (4 : 1), (3 : 1) and (5 : 2) respectively. The mixture of all these three containers are poured into a fourth container. The ratio of milk and water in the fourth container is
(a) 4 : 1
(b) 151 : 48
(c) 157 : 53
(d) 5 : 2

Q8. In a college union, there are 48 students, The ratio of the number of boys to the number of girls is 5 : 3. The number of girls to be added in the union, so that the number of boys to girls in 6 : 5 is
(a) 6
(b) 7
(c) 12
(d) 17

Q9. There are three bottles of mixture of syrup and water of ratio 2 : 3, 3 : 4, 7 : 5. 10 litres of first and 21 litres of second bottles are taken. How much quantity from third bottles is to be taken so that final mixture from three bottles will be ratios 1 : 1.
(a) 25 litres
(b) 20 litres
(c) 35 litres
(d) 30 litres

Q10. In a colored picture of blue and Yellow color, blue and Yellow color is used in the ratio of 4 : 3 respectively. If in upper half, blue : Yellow is 2 : 3, then in the lower half blue : Yellow is
(a) 1 : 1
(b) 2 : 1
(c) 26 : 9
(d) 9 : 26

Solutions:

Important Links for RRB NTPC Recruitment 2019
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