A watch gains 8 minutes every 24 hour. The clock was adjusted to show the exact time at 10 a.m. on a monday. When the watch shows the time 10:40 a.m. on saturday, what is the correct time?

The correct option is A 10 a.m.

24 hours in a standard clock is $\to 24$ hours and 8 minutes in the given clock.

1440 minutes in standard clock $\to 1448$ minutes in the given clock.

So, 1 minute in standard clock $\to \frac{1448}{1440}=\frac{181}{180}$minutes

From 10 a.m. Monday to 10: 40 a.m. Saturday $\to 120$ hours and 40 minutes $=7240$ minutes in the given clock.

In standard clock, this will correspond to $=7240\times \frac{180}{181}=7200$minutes or 120 hours.

So, the actual time will be at $\to$ 10 a.m. on Saturday.