Question

Dina set her watch 20 seconds behind, and it falls behind another 1 second everyday. How many days has it been since Dina last set her watch if the watch is 27 seconds behind?

Answer 1

Answer:

7 days

Step-by-step explanation:

The watch was set 20 seconds behind already, at the start.  The watch has lost 7 more seconds at the rate of 1 second per day.