This clock was set right on Monday at the time shown and loses 12 minutes every 24 hours. It reads 9 a.m. on Saturday of the same week. What is the true time then?

From Monday 10 a.m. the clock has run 119 hours (to Saturday 9 a.m.). It shows 1428 min for every 1440 true min, so the true time passed is $119\times 1440÷1428=120$ h = 5 days: Saturday 10:00 a.m. (9:48 a.m. subtracts the loss instead of adding it.)