Puzzles on Time, Duration, and Conversion
Puzzle 1
Convert 3 hours 45 minutes into minutes.
Hint: 1 hour = 60 minutes. Multiply hours by 60 and add the remaining minutes.
Answer: 3 hours = 3 × 60 = 180 minutes. So, 180 + 45 = 225 minutes.
Puzzle 2
A train departs at 10:15 AM and arrives at 2:50 PM. How much time has passed?
Hint: Subtract the departure time from the arrival time. Break the time into hours and minutes for easy calculation.
Answer: From 10:15 AM to 2:15 PM = 4 hours. Then from 2:15 PM to 2:50 PM = 35 minutes. So, the total time is 4 hours 35 minutes.
Puzzle 3
Convert 500 minutes into hours and minutes.
Hint: Divide the total minutes by 60. The quotient is hours, and the remainder is minutes.
Answer: 500 ÷ 60 = 8 hours with a remainder of 20 minutes. So, the answer is 8 hours 20 minutes.
Puzzle 4
If you start a task at 3:45 PM and finish at 5:30 PM, how much time did you spend?
Hint: Break the time into hours and minutes, and subtract the start time from the finish time.
Answer: From 3:45 PM to 5:00 PM is 1 hour 15 minutes, then from 5:00 PM to 5:30 PM is 30 minutes. So, total time is 1 hour 45 minutes.
Puzzle 5
Convert 125 minutes into hours and minutes.
Hint: Divide 125 by 60. The quotient is the number of hours, and the remainder is the number of minutes.
Answer: 125 ÷ 60 = 2 hours with a remainder of 5 minutes. So, the answer is 2 hours 5 minutes.
Puzzle 6
If a movie starts at 7:30 PM and ends at 10:00 PM, how long is the movie?
Hint: Subtract the start time from the end time, remembering to account for the hours and minutes.
Answer: From 7:30 PM to 10:00 PM is 2 hours 30 minutes.
Puzzle 7
Convert 2 days 12 hours into hours.
Hint: 1 day = 24 hours. Multiply the number of days by 24, then add the hours.
Answer: 2 days = 2 × 24 = 48 hours. 48 + 12 = 60 hours.
Puzzle 8
If a train travels for 3 hours and 45 minutes at a speed of 60 km/h, how far does it travel?
Hint: Convert the time to hours. Distance = Speed × Time.
Answer: 3 hours 45 minutes = 3.75 hours. Distance = 60 km/h × 3.75 hours = 225 km.
Puzzle 9
Convert 1000 seconds into minutes and seconds.
Hint: 1 minute = 60 seconds. Divide 1000 by 60 to find the minutes, then use the remainder for seconds.
Answer: 1000 ÷ 60 = 16 minutes with a remainder of 40 seconds. So, the answer is 16 minutes 40 seconds.
Puzzle 10
If you start a project at 11:00 AM and finish at 3:30 PM, how long did you work on it?
Hint: Break the time into hours and minutes and subtract the start time from the finish time.
Answer: From 11:00 AM to 3:00 PM is 4 hours, and from 3:00 PM to 3:30 PM is 30 minutes. Total time is 4 hours 30 minutes.
