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Quant – Ratio & Proportion – Set 5
Read the following instructions carefully
- The test contains 10 questions.
- Each question has 4 options, of which only one is correct.
- You have to finish the test in 8 minutes.
- You are awarded 1 mark for each correct answer, and 0.25 marks are deducted for each wrong answer.
- There is no negative marking for questions you do not attempt.
- You may pause the test at any time and resume where you left off.
- Your marks, the correct answers and an explanation for every question are shown as soon as you submit.
- You can take this test as many times as you like. A fresh set is drawn each time you reload the page.
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Review this set's questions and answers (opens after you submit the test)
This free practice set from AndamanJobs has 10 questions to be solved in 8 minutes. Every question is listed below with four options. Open Show answer and explanation under a question to see the correct option and why it is correct. Try the timed test above first, then use this list to revise the questions you got wrong.
- If A : B = 2 : 5, B : C = 2 : 3 and C : D = 5 : 7, find A : D.
- A. 1 : 5
- B. 40 : 211
- C. 21 : 4
- D. 4 : 21
Show answer and explanation
Answer: D. 4 : 21
A : D = (2 × 2 × 5) : (5 × 3 × 7) = 20 : 105 = 4 : 21.
- Rs 3600 is divided among A, B and C in the ratio 3 : 4 : 5. How much does B get?
- A. Rs 960
- B. Rs 1200
- C. Rs 840
- D. Rs 1080
Show answer and explanation
Answer: B. Rs 1200
Total parts = 12, one part = 3600/12 = 300. B gets 4 × 300 = Rs 1200.
- The sum of two numbers is 30 and they are in the ratio 2 : 3. Find the larger number.
- A. 18
- B. 22
- C. 24
- D. 14
Show answer and explanation
Answer: A. 18
One part = 30/5 = 6. Larger number = 3 × 6 = 18.
- Two numbers are in the ratio 5 : 8. If 10 is added to each, the ratio becomes 7 : 10. Find the smaller number.
- A. 21
- B. 31
- C. 25
- D. 27
Show answer and explanation
Answer: C. 25
Let the numbers be 5k and 8k. (5k + 10)/(8k + 10) = 7/10 gives k = 5. Smaller number = 5 × 5 = 25.
- The present ages of A and B are in the ratio 2 : 3. After 5 years the ratio will be 3 : 4. What is A's present age?
- A. 14 years
- B. 10 years
- C. 6 years
- D. 16 years
Show answer and explanation
Answer: B. 10 years
Let ages be 2k and 3k. (2k + 5)/(3k + 5) = 3/4 gives k = 5. A = 2 × 5 = 10 years.
- If A : B = 2 : 5 and B : C = 3 : 7, find A : B : C.
- A. 6 : 15 : 35
- B. 2 : 5 : 7
- C. 6 : 15 : 50
- D. 35 : 15 : 6
Show answer and explanation
Answer: A. 6 : 15 : 35
Make B equal: A : B = 6 : 15 and B : C = 15 : 35. So A : B : C = 6 : 15 : 35.
- Find x if 2 : 5 = 10 : x.
- A. 27
- B. 19
- C. 31
- D. 25
Show answer and explanation
Answer: D. 25
x = 5 × 10/2 = 25.
- Find the mean proportional between 5 and 80.
- A. 24
- B. 22
- C. 18
- D. 20
Show answer and explanation
Answer: D. 20
Mean proportional = √(5 × 80) = √400 = 20.
- Find the third proportional to 4 and 12.
- A. 32
- B. 36
- C. 48
- D. 44
Show answer and explanation
Answer: B. 36
Third proportional = 12²/4 = 144/4 = 36.
- A bag contains Re 1, 50 paise and 25 paise coins in the ratio 4 : 6 : 8. If the total value is Rs 180, how many 50 paise coins are there?
- A. 120
- B. 132
- C. 108
- D. 84
Show answer and explanation
Answer: A. 120
Let the coins be 4k, 6k and 8k. Value = 4k + 0.5 × 6k + 0.25 × 8k = 9k = 180. So k = 20 and the 50 paise coins = 6 × 20 = 120.