Question

A clock loses 5 seconds every hour. If the clock is set on Sunday at 12 noon, then what is the correct time the following Saturday, if the clock shows 12, midnight (give answer to the nearest minute)?

• A. II:53 p.m. on Saturday
• B. 11:47 p.m. on Saturday
• C. 00: 13 a.m. on Sunday
• D. 11: 52 p.m. on Saturday
• E. None of these

Answer 1

Answer: (C)

00: 13 a.m. on Sunday

Let the hours passed be $x$,
time shown on $clock1=12:00a.m$ saturday $(24\ast 6+12hrs)$
$3600x-5x=156\ast 60\ast 60$,
$x=156.21hrs=156hrs$ and $13mins$
actual time $=12:13a.m.$ saturday.