Selected MCQ

Current Question
If the ratio of ages of A and B is 3:5 and sum is 40, age of A ____.
  • A. 10
  • B. 12
  • C. 15
  • D. 20
Correct Answer: C
Explanation:
Total parts = 8.
Related Question 1
If the ratio of ages of A and B is 3:5, after 10 years it becomes 5:7. Present age of A is ____.
  • A. 15
  • B. 18
  • C. 20
  • D. 25
Correct Answer: A
Explanation:
Solving Equation gives A = 15.
Related Question 2
Average speed of bus including stoppages is 45 km/h, and excluding is 54 km/h. Find stoppage time ratio.
  • A. 9
  • B. 10
  • C. 12
  • D. 20
Correct Answer: B
Explanation:
Speed ratio gives stoppage.
Related Question 3
Ratio of speed of boat to stream is 36:5. Time downstream is 5h 10min. Find upstream time.
  • A. 5h 50m
  • B. 6h
  • C. 6h 50m
  • D. 12h 10m
Correct Answer: C
Explanation:
Use the ratio method for speeds.
Related Question 4
If the ratio of two numbers is 5:7 and their sum is 144, the numbers are ____.
  • A. 50 and 94
  • B. 60 and 84
  • C. 70 and 74
  • D. 65 and 79
Correct Answer: B
Explanation:
Total parts = 12 → each = 12 → numbers = 60 and 84.
Related Question 5
If ratio of two numbers is 3:5 and difference is 20, numbers are ____.
  • A. 30 and 50
  • B. 40 and 60
  • C. 20 and 40
  • D. 25 and 45
Correct Answer: A
Explanation:
Difference = 2 parts → 1 part = 10.