All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars
 perplexus dot info

 Ambiguous PIN Code (Posted on 2010-11-17)
Susan couldn't quite remember her bank PIN code.

She knew:

• It had 4 or 5 digits.
• It used 4 or 5 different digits.
• The first digit is 4 or 5.
• The second digit is 4 or 5 and none of the other digits is smaller.
• The number is 4 or 5 times a prime number.
• If you reverse the order of the digits, the resulting number has 4 or 5 prime factors, all different.
• In 4 or 5 of these facts, the "4" is the correct number.

What is Susan's PIN code?

 See The Solution Submitted by Charlie Rating: 2.5000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 re: Possible solution -- don't consider this closed yet | Comment 2 of 8 |
(In reply to Possible solution by broll)

Look again.

Interesting "inside" quip, though at the end of broll's comment.

 Posted by Charlie on 2010-11-17 16:30:25

 Search: Search body:
Forums (0)