Multiple choice

On January 1st at 12 am the clock which is 5% faster than a usual clock , was set to correct time.When will clock show the correct time again ?

  1. 10th Jan 10:00 am

  2. 11th Jan 12:00 am

  3. 10th Jan 12:00 am

  4. 11th Jan 2:00 am

  5. 10th Jan 1:00 am
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The clock gains 5 minutes every 100 minutes (5% faster). To show the correct time again, it must gain 12 hours (720 minutes). Time taken = 720 / (5/100) = 720 * 20 = 14400 minutes = 240 hours = 10 days. Jan 1st 12am + 10 days = Jan 11th 12am.

Keep practicing — related questions