Selected MCQ

Current Question
The product of the areas of three adjacent faces of a rectangular box is equal to ____.
  • A. Volume of the box
  • B. Twice the volume
  • C. Square of the volume
  • D. Cube root of the volume
Correct Answer: C
Explanation:
Product of face areas = (l×b)(b×h)(h×l) = (lbh)².
Related Question 1
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 2
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 3
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 4
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.
Related Question 5
A rectangular field is fenced on three sides, leaving one side of 20 ft open. If the area is 680 sq ft, what is the length of the fence?
  • A. 34 ft
  • B. 40 ft
  • C. 68 ft
  • D. 88 ft
Correct Answer: D
Explanation:
Solve dimensions and add three sides.