Answer : 10
Q2. If a : b = b : c, then a^6 : b^6 is equal to
Answer : a^3: c^3
Q3. Find third proportional of 0.9 and 1.2.
Answer : 1.6
Q4.If a : b = 5 : 4 and b : c = 3 : 4, then what is a : c?
Answer : 15 : 16
Q5. If 𝑥= 3/5𝑦 and 𝑦= 2/3𝑧, then find x: y: z.
Answer : 6: 10: 15
Q6. The monthly salaries of two persons A and B are in the ratio of 3 : 5 respectively. If both of them received an increment of Rs 250, then the ratio becomes 2 : 3. What were their respective salaries before the increment?
Answer : Rs 750 & Rs 1,250
Q7. If p: q: r= 3: 4: 5, then find the value of √2(𝑝2+𝑞2+𝑟2).
Answer : 2r
Q8. Two numbers are in ratio 4: 5. If 2 is added to the first and 2 is subtracted from the second the ratio becomes 10: 11. Find the sum of numbers.
Answer : 63
Q9. Sum of two numbers is 80, and their difference is 8. Which of the following can be the ratio of two numbers?
Answer : 11:9
Q10. The ratio of the four numbers is 2: 3: 4: 5. If their sum is 70, what is the sum of the first and fourth number?
Answer : 35
Q11. Three persons, X, Y and Z walk from place A to B. Their speeds are in ratio 2: 4: 5. If the distance between A and B is 5 km, the ratio of the time taken by them to reach B will be:
Answer : 10: 5: 4
Q12. If a: b = 4: 5, find the value of 5𝑎−2𝑏/5𝑎+2𝑏.
Answer : 1/3
Q13. Sum of three numbers is 48. The ratio of the first number to second is 3: 4 and that of the second to the third is 4: 5. Find 2nd number.
Answer : 16
Q14. The mean proportional between 4 and 8 is:
Answer : 4√2
Q15. Ratio of milk and water in a container containing 100 liters of the mixture is 3: 1. After the addition of some more milk into it, the ratio becomes 4: 1. Find the quantity of milk added.
Answer : 25 litres
