EXERCISE

$1$ January $1992$ is on the same day as:

$1$ January $1992$ will not be on the same day as:

How many leap years are there in the first $400$ years?

A clock that gains uniformly is $4$ minutes slow at $8$ o'clock in the morning on Monday, and it is $6$ minutes fast at $8$ o'clock in the evening on the following Monday. When was it correct?

A clock that loses uniformly is $8$ minutes fast at $6$ o'clock in the morning on Tuesday, and it is $2$ minutes slow at $8$ o'clock in the evening on Friday of the same week. When was it correct?

The two hands of an incorrect clock coincide after every $68$ min. How much time does the clock gain or lose in $1$ day?

The two hands of an incorrect clock coincide after every $60$ min. How much time does the clock gain or lose in $1$ day?

When the hands are in opposite direction, they are apart by: