Final answer:
The true time when the clock indicates 4 am on the following Saturday is 10 am on Sunday.
Step-by-step explanation:
To find the true time when the clock indicates 4 am on the following Saturday, we need to calculate the amount of time the clock loses per hour and then determine the total time lost from Monday 10 am to Saturday 4 am.
The clock loses 15 minutes in 24 hours, which is equivalent to 15/24 minutes per hour. So, the clock loses 15/24 minutes per hour for a total of 118 hours from Monday 10 am to Saturday 4 am (6 days and 18 hours).
Therefore, the true time when the clock indicates 4 am on the following Saturday would be 10 am on Sunday.