perplexus.info :: Just Math : 00 Separate

00 Separate (Posted on 2003-10-10)

Prove that the numbers that begin with 1 and end with 1, with any number of 2s in the middle, and all 1s and 2s separated by 00 are composite.

For example:
1002001
1002002001,
1002002002001,
1002002002002001

See The Solution Submitted by Gamer

Rating: 3.5714 (7 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

Simple solution, with no words!

| Comment 8 of 13 |

1001001001...001001001 x 1001 =

1001001001...001001001000
++ 1001001...001001001001 =
-------------------------
1002002002...002002002001
Edited on October 11, 2003, 10:46 am

Posted by Federico Kereki on 2003-10-11 10:44:15

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