perplexus.info :: Just Math : Duodecimal Digits

Duodecimal Digits (Posted on 2011-09-22)

Determine the possible nonzero units digits of a duodecimal positive integer n such that:

Each of n and n+2 is a prime number, and:

n+2 is expressible as the sum of squares of two positive itegers.

Submitted by K Sengupta

Rating: 4.5000 (2 votes)

Solution: (Hide)

The only possible digit is B.

For a detailed explanation, refer to the solution submitted by Math Man in this location.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Answer and proof	Math Man	2011-09-22 21:50:22
re: heuristic computer exploration -- no proof	Charlie	2011-09-22 21:38:05
Possible solution	broll	2011-09-22 21:21:03
answer	Dej Mar	2011-09-22 15:53:59
heuristic computer exploration -- no proof	Charlie	2011-09-22 15:21:02

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