Interesting Question of the Day – 24 November 2017

How many times in a day do the hour hand and minute hand on a clock make a right angle?

The first new player to comment on the website with the correct answer wins a free drink at their next iQ Trivia show.

 

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4 comments on “Interesting Question of the Day – 24 November 2017
  1. Nathan says:

    I imagine it is twice an hour, so 48 times.

    • iqtrivia says:

      Close. The minute hand makes 24 circuits, and it would be perpendicular to the hour hand twice per hour making 48.

      Except that the hour hand also moves.

      Want to recalculate?

      • Nathan says:

        Hmm.
        So if the hour hand goes at 1/12 speed of the minute hand, it’s speed should mean that its slow pursuit eliminates some opportunities for the minute hand to get in a 90 degree position in the 24 hour period.

        At 1/12 speed let’s say it eliminates 1/12 of the opportunities. That would be 4 of my 48.

        Leaving a final answer of 44.

        How’s that?

        • iqtrivia says:

          That’s some good mathematical thinking.

          It’s twice every hour, except for 2:00 and 8:00 when there is just one per hour.