Ratio, Proportion & Simple Interest
Q1. The ratio of 60 paise to ₹3 is
Correct Answer: A. 1:5
Q2. If x:10 = 15:25, then the value of x is
Correct Answer: B. 6
Q3. The ratio of boys to girls in a class is 4:3. If there are 28 boys, the number of girls is
Correct Answer: C. 21
Q4. If 15 men can complete a work in 6 days, how many days will 10 men take?
Correct Answer: C. 9 days
Q5. The ratio of 2 km to 400 m is
Correct Answer: C. 5:1
Q6. If the cost of 6 pens is ₹90, what is the cost of 10 pens?
Correct Answer: C. ₹150
Q7. Two numbers are in the ratio 3:5 and their sum is 80. The smaller number is
Correct Answer: B. 30
Q8. The simple interest on ₹5,000 at 10% per annum for 2 years is
Correct Answer: B. ₹1,000
Q9. At what rate of interest will ₹2,000 yield ₹400 as simple interest in 2 years?
Correct Answer: C. 10%
Q10. In how many years will ₹3,000 double itself at 10% per annum simple interest?
Correct Answer: C. 10 years
Q11. The compound ratio of 2:3 and 4:5 is
Correct Answer: B. 8:15
Q12. If a car covers 150 km in 3 hours, its speed is
Correct Answer: C. 50 km/h
Q13. A sum of money amounts to ₹2,400 in 2 years at simple interest. If the interest is ₹400, the principal is
Correct Answer: B. ₹2,000
Q14. The third proportional to 4 and 6 is
Correct Answer: B. 9
Q15. The mean proportional between 4 and 9 is
Correct Answer: B. 6
Q16. If $A:B = 2:3$ and $B:C = 4:5$, then $A:B:C$ is
Correct Answer: A. 8:12:15
Q17. The ratio of the area of a square to its perimeter when side is 4 cm is
Correct Answer: A. 1:1
Q18. If ₹1,200 is divided between Ram and Shyam in the ratio 2:3, Shyam gets
Correct Answer: C. ₹720
Q19. Income of a person is ₹15,000 and expenditure is ₹12,000. The ratio of saving to income is
Correct Answer: B. 1:5
Q20. A train covers 60 km in 45 minutes. Its speed in km/h is
Correct Answer: C. 80 km/h