Selected MCQ

Current Question
A lift moves 57 floors per minute. Starting from the 11th floor, how many floors can be reached in 30 seconds?
  • A. 19
  • B. 28
  • C. 30
  • D. 37
Correct Answer: C
Explanation:
Half minute → 57/2 ≈ 28 floors + starting gives 30.
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
Pipes P, Q, R fill the tank in 20, 15, 12 minutes. Together fill in ____.
  • A. 5 min
  • B. 10 min
  • C. 15 min
  • D. 20 min
Correct Answer: A
Explanation:
Combined rate.
Related Question 3
Three pipes, A, B, and C, fill the tank in 30, 20, and 15 minutes, respectively. Together they fill in ____.
  • A. 5/11
  • B. 6/11
  • C. 7/11
  • D. 8/11
Correct Answer: B
Explanation:
Combined rate calculation.
Related Question 4
In a group of 30 people, if everyone shakes hands once, how many handshakes?
  • A. 870
  • B. 435
  • C. 30!
  • D. 29! +1
Correct Answer: B
Explanation:
n(n−1)/2.
Related Question 5
Total cost of flooring a room at Rs. 8.50 per m² is Rs. 510. Find the area.
  • A. 7.5 m²
  • B. 8.5 m²
  • C. 10.5 m²
  • D. 12.5 m²
Correct Answer: A
Explanation:
Area = cost/rate = 510/8.5.