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Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion

Q1. The ratio of Manish’s salary to Amit’s salary is 3 : 7 . The ratio of Payal’s salary to Amit’s salary is 2 : 5. If total income of all the three is 12000. Then the difference between the salary of Manish & Amit is ?
(a) 3150
(b) 3750
(c) 3850
(d) 3350

Q2. The sum of the present ages of Dharmendra and Amitabh is 65 years. Ten years ago their ages were in the ratio 7 : 2. What will be the ratio of their ages 12 years hence?
Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_50.1

Q3. Out of 3750 villagers in a village, the ratio of number of adults and number of minors is 7 : 3 . Find the number of girl children, if the ratio of minor boys to minor girls is 10: 5?
(a) 365
(b) 315
(c) 375
(d) 345

Q4. A box contains 50p, 25p & 10p coins in the ratio 2 : 4 : 5 , amounting to 220 Rs. Find the total number of coins of 50p & 25p ?
(a) 516
(b) 517
(c) 528
(d) 520

Q5.  Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_60.1
Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_70.1

Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_80.1

Q6. The number of male politician to the number of female politician in parliament is 7 : 8 . If percentage increase in the number of male politician and number of female politician be 20% and 10% respectively, what will be the new ratio?
Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_90.1

Q7. Ratio of income of Amar and Akbar is 4:7. If income of Amar increases by 50% and those of Akbar decreases by 25%, the new income ratio incomes 8 : 7. What is the income of Amar ?
(a) Rs. 21000
(b) Rs 26000
(c) Rs 23000
(d) Data Inadequate

Q8. If Rs 565 is divided into three parts, proportional to Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_100.1 then the second part is?
(a) 215
(b) 205
(c) 225
(d) 235

Q9. If A : B = 2 : 3, B : C = 4 : 5, C : D = 6 : 7. Find A : B : C : D.
(a) 14 : 24 : 30 : 29
(b) 15 : 24 : 30 : 31
(c) 10 : 24 : 20 : 35
(d) 16 : 24 : 30 : 35

Q10. In a mixture of two types of oils O₁ & O₂ the ratio O₁ : O₂ is 3 : 2. If the cost of oil O₁ is Rs. 4/L and that of oil O₂ is Rs. 9/L. Then find the cost of Resulting mixture
(a) Rs. 5
(b) Rs. 6
(c) Rs. 7
(d) Rs. 9

Solutions:

Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_110.1

Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_120.1

Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_130.1

Mathematics Quiz For RRB NTPC : 10th February For Ratio & Proportion_140.1

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