This week, we have some puzzles for you!
The Solstice Puzzle
The part of the Earth enclosed between the Tropic of Cancer (23.44° North of the Equator) and the Tropic of Capricorn (23.44° South of the Equator) might have the Sun directly overhead at some point during the year. What fraction of the surface of the Earth will never have the Sun directly overhead?
La Scuadra di Milano
Two football players are located in a specific location on a football pitch. Where should a third player be located such that the triangle that is formed between them has a right angle?
Too many airports
A country has $N > 6$ airports and you can take a flight between any pair of airports. Suppose that you want a return ticket from airport A to airport B, going via at most two other airports on each part of the journey. How many combinations of airports are there such that no connecting airport is visited more than once throughout the whole trip?
If you enjoyed these puzzles, you should try our crossnumber! You have until 22 July 2017 to submit an answer. Correct answers might win prizes!
More from Chalkdust
- We reveal the solutions to our Christmas puzzles!
- Puzzle #3 in our 2020 Christmas puzzle series
- Puzzle #2 in our 2020 Christmas puzzle series
- Puzzle #1 in our 2020 Christmas puzzle series
- Now available to catch up on YouTube
- Independent Sage's Christina Pagel, hyperbolic mindfulness and make-your-own Markov tweet feature in our latest edition. Plus all your favourite puzzles & columns.