How many times in a day,are the hands of a clock in a straight line but opposite in direction?

March $5, 1999$ was a Friday. What day of the week was March $5, 2000$?

If John celebrated his victory day on Tuesday,January $5, 1965$,when will he celebrate his next victory day on the same day?

If the day after tomorrow is Sunday,what day was tomorrow's day before yesterday?

How often between $11$ $O$'clock and $12$ $O$'clock are the hands of a clock in integral number of $minutes$ apart (in $\times$)?

$A$ clock strikes once for every half an hour and strikes a number of times equal to the hour at the beginning of every hour. What was the total number of strikes given by the clock from $8:00$ to $12:00$?