On a clock the three hands - the second, minute and hour hands - are on the same axis. How often in a 24 hour day will the second hand be parallel to either of the two other hands?
How good are you at estimating angles?
Can you use LOGO to create this star pattern made from squares. Only basic LOGO knowledge needed.
At the time of writing the hour and minute hands of my clock are at right angles. How long will it be before they are at right angles again?