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- Question
Of three positive numbers, the ratio of the first and second numbers is 3:4 & that of the second and third numbers is 5:6. The product of the second and third numbers is 4320. What is the sum of three numbers?
Options- A. 167
- B. 177
- C. 187
- D. 197
- Correct Answer
- 177
ExplanationLet the second & third numbers are 2x & 3x respectively.
ATQ,
5x*6x = 4320
30*x*x = 4320
x*x = 144
x=12
Hence, second number = 5x = 5*12 = 60
Third number = 6x = 6*12 = 72
Ratio of first & second number = ¾
Hence, first number = ( ¾)*60 = 45
Sum of these 3 numbers = 60+72+45 = 177 - 1. In an army selection process, the ratio of selected to unselected candidates was 6:1. If 30 less had applied and 10 less selected, the ratio of selected to unselected would have been 7:1. How many candidates had applied for the process?
Options- A. 910
- B. 1820
- C. 455
- D. 2730 Discuss
- 2. If a : b is 32 : 35 and b : c is 21 : 32, then a : c is?
Options- A. 5 : 3
- B. 3 : 5
- C. 1 : 1
- D. 5 : 7 Discuss
- 3. The ratio of three numbers is 2 : 3 : 5. If the sum of the three numbers is 275, then what is the largest among the three numbers?
Options- A. 142
- B. 137.5
- C. 82.5
- D. 110.5 Discuss
- 4. P and Q are two alloys which are prepared by mixing tin and lead in the ratio of 12 : 5 and 4 : 3 respectively. If equal quantities of alloys are melted to form athird alloy R, then what is the ratio of tin and lead in alloy R?
Options- A. 84 : 65
- B. 57 : 35
- C. 76 : 43
- D. 78 : 47 Discuss
- 5. The income of X, Y and Z are in the ratio of 3 : 4 : 2 and their expenses in the ratio of 5 : 5 : 2. If X saves Rs 3000 out of an income of Rs 18000, then whatwill be the saving (in RS) of Y
Options- A. 4500
- B. 9000
- C. 6000
- D. 7500 Discuss
- 6. If 15% of x is three times of 10% of y, then x:y =
Options- A. 1:2
- B. 2:1
- C. 3:2
- D. 2:3 Discuss
- 7. The ratio of the ages of two boys is 3:4. After 3 years, the ratio will be 4:5.The ratio of their ages after 21 years will be
Options- A. 14:17
- B. 17:19
- C. 11:12
- D. 10:11 Discuss
- 8. If A : B = 2 : 5, B : C = 4 : 3 and C : D = 2 : 1, then what is value of A : C : D?
Options- A. 6 : 5 : 2
- B. 7 : 20 : 10
- C. 8 : 30 : 15
- D. 16 : 30 : 15 Discuss
- 9. What number should be added to each of the numbers 35, 115, 53 and 165, so that the resulting numbers are in continued proportion?
Options- A. 10
- B. 12
- C. 8
- D. 6 Discuss
- 10. Select the related number from the given alternatives. 0.02 : 0.002 :: 1/3 : ?
Options- A. 0.333
- B. 1/30
- C. 0.003
- D. 3 Discuss
Ratio and Proportion problems
Search Results
Correct Answer: 910
Correct Answer: 3 : 5
Correct Answer: 137.5
Correct Answer: 76 : 43
Correct Answer: 9000
Correct Answer: 2:1
Correct Answer: 10:11
Correct Answer: 16 : 30 : 15
Correct Answer: 10
Correct Answer: 1/30
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