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Article: Brain teaser.(Problem Page)
- Article from:
- The Engineer
- Article date:
- November 21, 2003
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Two donkeys walk towards each other, one at 3mph, the other at 5mph. When they are 10 miles apart, a fly takes off from the back of one, and flies at 12mph in a straight line to the second, whereupon it instantaneously turns and returns to the first. It then turns and flies back to the second, continuing to fly back and forth until the donkeys finally meet. What is the total distance travelled by the fly?
Solution next issue. Sent in by Alistair Neill, East Kilbride, who wins tickets to Glasgow's Science Centre.
Last issue's question: Find two four-figure numbers, both squares, ...