Selected MCQ

Current Question
A discount series of 10%, 20%, and 40% is equal to a single discount of ____.
  • A. 50%
  • B. 56.8%
  • C. 60%
  • D. 70.28%
Correct Answer: B
Explanation:
Equivalent discount = 1 − (0.9×0.8×0.6) = 56.8%.
Related Question 1
Successive discounts of 20% and 15% are equal to a single discount of ____.
  • A. 35%
  • B. 38%
  • C. 32%
  • D. 29%
Correct Answer: C
Explanation:
Combined discount = 1 − (0.8×0.85).
Related Question 2
A single discount equivalent to 20%, 10%, and 5% successive discounts is ____.
  • A. 25%
  • B. 30%
  • C. 31.6%
  • D. 33.5%
Correct Answer: C
Explanation:
Equivalent = 1 − (0.8×0.9×0.95) = 31.6%.
Related Question 3
12 inches equals how many centimeters?
  • A. 30.48
  • B. 29
  • C. 34.12
  • D. 24
Correct Answer: A
Explanation:
1 inch = 2.54 cm.
Related Question 4
Three pipes of equal capacity fill a tank in 8 houRs. Two pipes will take ____.
  • A. 17 hours
  • B. 12 hours
  • C. 16 hours
  • D. 24 hours
Correct Answer: B
Explanation:
Work is inversely proportional.
Related Question 5
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.