Question

between twelve o'clock midnight and twelve o clock noon how many times are the minute hand and hour hand of a clock at right angles to each other?

Answer 1

Explanation:

The hands are at right angles to each other twice in every hour except that the only time between 2:00 and 3:00 is just after 2:27 and the only time between 8:00 and 9:00 is just after 8:27

Answer 2

The minute hand and hour hand of a clock have 12 right angles to each other.