Selected MCQ

Current Question
If x% of 80 equals 20% of y, what are x and y?
  • A. x=20, y=20
  • B. x=20, y=40
  • C. x=20, y=80
  • D. Cannot be determined
Correct Answer: D
Explanation:
Infinite solutions exist without an extra condition.
Related Question 1
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 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
Sum of two numbers is 2490. 6.5% of one equals 8.5% of the other. Find numbeRs.
  • A. 989,1501
  • B. 1011,1479
  • C. 1401,1089
  • D. 1411,1079
Correct Answer: D
Explanation:
Solve the ratio Equation.
Related Question 4
The radius of a cylinder equals that of a sphere. Compare their volumes.
  • A. 4/3 times
  • B. 2/3 times
  • C. Equal
  • D. Equal to diameter
Correct Answer: A
Explanation:
Sphere volume = 4/3 πr³ vs cylinder πr²h.
Related Question 5
If roots are α and β, then product αβ equals ____.
  • A. b/a
  • B. −b/a
  • C. c/a
  • D. −c/a
Correct Answer: C
Explanation:
Product = c/a.