You have the misfortune to own an unreliable clock. This one gains exactly 12 minutes every hour. It is now showing 10 pm and you know that it was correct at midnight, when you set it. The clock stopped four hours ago, what is the correct time now?
10:20 pm
The clock is gaining 12 minutes every hour --> for every real hour that has passed, the clock will show 72 minutes. The clock shows 10:00 pm = 22:00 hrs, so 22 x 60 = 1320 clock minutes have passed. (1320 / 72) x 60 = 1100 real minutes = =18 hours 20 minutes = 6:20 pm. The clock stopped 4 hours ago, therefore the time must now be 10:20 pm
You have the misfortune to own an unreliable clock. This one gains exactly 15 minutes every hour. It is now showing 3:00 am and you know that it was correct at midnight, when you set it. The clock stopped four hours ago, what is the correct time now?
A clock was correct at midnight.
From that moment it began to lose four minutes per hour.
The clock stopped three hours ago showing 12:08pm.
The clock runs for less than 24 hours. What is the correct time now?
Clock A was correct at midnight.
From that moment it began to lose two and a half minutes per hour.
The clock stopped one hour ago showing clock B.
What is the correct time now? The clock runs for less than 24 hours.
Clock A 00:00 Clock B 17;15
From that moment it began to lose three minutes per hour.
The clock stopped 90 minutes ago showing 17:06.
The clock runs for less than 24 hours.
What is the correct time now?
Clock A was correct at midnight. From that moment it began to lose four minutes per hour.
The clock stopped two hours ago showing clock B. What is the correct time now? The clock runs for less than 24 hours.
