#224 European Map, Skills: Attention to Detail, Logical Thinking
As birds migrate to warmer climates, starting in Helsinki how many routes could you potentially take to end up in Lisbon without retracing your path and always travelling in either a southerly, easterly or westerly direction?
ANSWER: Answered by calculating the number of available alternatives at each waypoint going south, being: Reykjavik – 2 routes available, Oslo – 3 routes available, Stockholm – 1 route available, Copenhagen – 2 routes available, Berlin – 3 routes available, Vienna – 1 route available, Bern – 1 route available, Amsterdam – 2 routes available, Brussels – 1 route available, London – 3 routes available, Paris – 2 routes available, Madrid – 1 route available, or 2 x 3 x 1 x 2 x 3 x 1 x 2 x 1 x 3 x 2 x 1 = 432