Selected MCQ

Current Question
A, B, and C start running around a circular track. When do they meet again?
  • A. 26 min 18 sec
  • B. 42 min 36 sec
  • C. 45 min
  • D. 46 min 12 sec
Correct Answer: D
Explanation:
LCM of times.
Related Question 1
Three men walk around a circular track of 11 km. Find a time for them to meet again.
  • A. 11 hours
  • B. 12 hours
  • C. 220 hours
  • D. 22 hours
Correct Answer: A
Explanation:
LCM of time intervals.
Related Question 2
A man walks around a circular field once per hour. At what time will he complete a round if he starts at 7:42 a.m.?
  • A. 7:42 a.m.
  • B. 7:48 a.m.
  • C. 8:10 a.m.
  • D. 8:30 a.m.
Correct Answer: A
Explanation:
One full round takes exactly 1 hour, so the time remains the same format.
Related Question 3
P lays railway track in 16 days. Q does the same in 24 days. Together they finish in ____.
  • A. 9⅗ days
  • B. 9⅕ days
  • C. 9⅖ days
  • D. 10 days
Correct Answer: A
Explanation:
The combined rate yields 9⅗ days.
Related Question 4
A and B can do the work in 15 and 10 days. If they start together and A leaves after some days, total time ____.
  • A. 8 days
  • B. 10 days
  • C. 12 days
  • D. 15 days
Correct Answer: C
Explanation:
Solve with work fractions.
Related Question 5
Two automobiles 150 km apart move toward each other. Time to meet is ____.
  • A. 2.5 hr
  • B. 2 hr
  • C. 1.75 hr
  • D. 1.5 hr
Correct Answer: D
Explanation:
Relative speed method.