Clarification

Why answer for 4 is 204?

If we have 143 three-digit primes numbers each of them can create 10 four-digit threeprimes numbers!

a1a2a3 - three-digit prime number -> a1a2a3* - four-digit threeprime number

+some numbers *a1a2a3 which is not included early.

So answer must be larger than 204.

Whats wrong? I don't understand...

Re: Clarification

"Pasha calls an integer a threeprime number if ANY( !!! ) three consecutive digits of this integer form a three-digit prime number"

Read the statement. For the first time i didn't understand too :-)))

Re: Clarification

Finally understand it. Thanks a lot!

*Edited by author 27.10.2007 16:19*

Re: Clarification

if all three consecutive letters.....

bla bla ....

any is clearly not very clear....