Enigma 149: A base problem
30 November 2013
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From New Scientist #1294, 25th February 1982 [link]
The answer to each of the subtraction sums in the above is the same positive number. Each letter stands for a different digit between 1 and 9 inclusive: none stands for zero.
Notice that I have not said that the numbers are expressed to the base 10. But they are all to the same base.
What is ICER in digits? And what is the base?
On 30th November 2011 (two years ago) I set up this site for sharing programmed solutions to Enigma puzzles. I started off with 5 puzzles from November 2011. Now there are 561 puzzles available on the site, including a complete archive of puzzles from December 2005 to date (8 years of puzzles), as well as the first 149 puzzles from the start of Enigma (February 1979 to February 1982 – 3 years of puzzles). All together the site currently covers 31.6% of all the Enigma puzzles published, and I’ll carry on putting up old and new puzzles as long as I can source them.