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January 1998
Puzzle No. 4 - Three doors

Here is this issue's puzzle.

Solution to Puzzle No. 3 - birth dates

The following people submitted correct answers:
- Leigh Dyment, Summerside, PE, Canada.
- Arthur Stratford, Cambridge, England.
- Surya, Memphis, TN, USA.
- Andrew Williams, Sussex, England.

The taxi problem revisited

Following on from this issue's article "Image analysis - a modern application of mathematics", we revisit the taxi problem from issue no. 2 (see "The taxi problem").

The coin tossing problem

Following on from this issue's article "What a coincidence!", this page on coin tossing takes you through the calculation of the length of longest run of heads in n coin tosses.

  • Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.