How many times in a day, the hands of a clock are shows opposite directions ? Choose one
A) 12 B) 20 C) 21 D) 23 E) 22
Sol.   In 12 hours, the hands coincide or are in opposite direction 11 times.   âˆ´ In 24 hours, the hands coincide or are in opposite direction 22 times a day.   ( between 5 and 7 they point in opposite directions at 6 o'clock only)   Answer 22
<result>E</result>
How many times in a day, the hands of a clock are shows opposite directions ?