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New Scientist puzzle #29: How many strips?

6 November 2019

#29 How many strips?

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

How many 3 x 1 strips, like the example pictured, can be cut out of this piece of wood?

Answer next week

#28 A well-timed nap

Solution

One hour is 60 minutes for the minute hand, and 1 hour is one-twelfth of a circle (i.e. 30°) for the hour hand. In other words, if the time is “m” minutes past the hour, then the hour hand has travelled through ½m degrees past the hour.

Suppose that when I go to sleep, the angle between the minute and hour hand = m. If the minute hand is…

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