Enigma 217: Auntie Greta’s age
26 August 2014
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From New Scientist #1363, 23rd June 1983 [link]
“You want to know how old I am?” said Auntie Greta to her two nieces. “Well, as you know, your ages (in years) have no common factor higher than 1. My age (in years) is not an exact multiple of the age of either of you, but the square of my age is exactly the average of the cubes of your ages. So I am …”
How many years old?
This puzzle brings the total number of Enigmas on the site to 700. There’s a continuous archive of puzzles from Enigma 1299 on 24th July 2004 until the final puzzle, Enigma 1780 at the end of 2013 (482 puzzles). There is also a continuous archive from the start of Enigma in February 1979, up to Enigma 217 on 23rd June 1983 (217 puzzles), along with a lone puzzle from 2000 this brings us to 700 Enigmas in total, and leaves around 1085 puzzles to source and upload.
In total just over 39% of all Enigma puzzles are now available on the site. I will continue to expand the archive as time and internet connection allow.
Note: I am waiting for a phone line to be connected at my new house, so I only have sporadic access to the internet at the moment.