Selected MCQ

Current Question
Two numbers are respectively 20% and 50% more than a third number. What is their ratio ____.
  • A. 2: 5
  • B. 3: 5
  • C. 4: 5
  • D. 6: 7
Correct Answer: C
Explanation:
1.2x: 1.5x = 4: 5.
Related Question 1
Three numbers are co-prime. The product of the first two is 551. Find the third.
  • A. 75
  • B. 81
  • C. 85
  • D. 89
Correct Answer: C
Explanation:
Factorization approach.
Related Question 2
Three numbers: 5/7 of the first equals 48% of the second, and the second is 1/9 of the third. Find first.
  • A. 168
  • B. 84
  • C. 42
  • D. 21
Correct Answer: D
Explanation:
Solve the proportion.
Related Question 3
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 4
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.
Related Question 5
If ratio of two numbers is 7:9 and their sum is 160, numbers are ____.
  • A. 60 and 100
  • B. 70 and 90
  • C. 65 and 95
  • D. 75 and 85
Correct Answer: B
Explanation:
Total parts = 16 → each = 10 → numbers 70, 90.