arithmetic - a clock is set right at 6 am the clock loses 16 minutes in 24 hours what will be the true time when the clock indicates 10 pm on 4th day - skillgun

Time from 5 a.m. on a day to 10 p.m. on 4th day = 89 hours.
Now 23 hrs 44 min. of this clock = 24 hours of correct clock.
356/15 hrs of this clock = 24 hours of correct clock.
89 hrs of this clock = (24 x 31556 x 89) hrs of correct clock. = 90 hrs of correct clock.
So, the correct time is 11 p.m.