### Random Post

### Recent Posts

### Recent Comments

### Archives

### Categories

- article (11)
- enigma (1,270)
- misc (3)
- project euler (2)
- puzzle (67)
- site news (50)
- tantalizer (69)
- teaser (7)

### Site Stats

- 206,371 hits

Programming Enigma Puzzles

21 December 2018

Posted by on **From New Scientist #2187, 22nd May 1999** [link]

George’s new office has a security lock in which you have to key in a series of digits — all different — before you can open the door. Unfortunately, George is having difficulty committing this security number to memory.

So far, he has memorised a number comprising a selection of different digits from the security number. He has made a note of the memorised number on the memo sheet on which he was given the security number.

After studying the sequence yet again, he absent-mindedly left the memo lying around his house. When his wife found the piece of paper bearing just two numbers, she thought George has been trying to devise an “Alphametic”

EnigmaforNew Scientist. Just for fun, she multiplied the numbers together and found that the product was a seven-digit number in which all the digits are the same.What is George’s office security number?

[enigma1031]

%d bloggers like this:

This Python program runs in 85ms.

Run:[ @repl.it ]Solution:George’s security number is: 37192.The number George has memorised is 239.