Multiple choice

A clock gains $15$ minutes per day. It is set right at $12$ noon. What time will it show at $4.00$ am, the next day?

  1. $4:10 $am
  2. $4:45$ am
  3. $4:20$ am
  4. $5:00$ am
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The clock gains 15 minutes in 24 hours. From 12 noon to 4 am is 16 hours. Gain = (15/24) * 16 = 10 minutes. The clock will show 4:10 am.

AI explanation

The total time from 12 noon to 4:00 am the next day is 16 hours. Using the proportion method, the clock gains 15 minutes in 24 hours, so in 16 hours it gains (15 / 24) * 16 = 10 minutes. Adding this 10 minute gain to the actual time of 4:00 am gives 4:10 am.

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