Brain Teaser! August 22, 2009

Here is this week's brain teaser. Remember to post your answer to the discussions tab of the Cramster.com Facebook Fan Page!

Brain Teaser

Here's the latest brain teaser:

Arrange the numbers "11337799" to form an 8-digit number (referred to as "ABCDEFGH") that will meet the following conditions:

1. ABCDEFGH is a prime number
2. HGFEDCBA (reversing the digits) is a prime number
3. All consecutive two-digit subsets of ABCDEFGH are prime numbers (AB, BC, CD, DE, EF, FG, GH are all prime)
4) All consecutive two-digit subsets of HGFEDCBA are prime numbers (HG, GF, FE, ED, DC, CB, BA are all prime)

Know the answer?

First one to post the correct answer to the discussion tab of the Cramster.com Facebook Fan Page gets 10 karma points this week!

COMMENTS:
13791379 is a prime number
97131379 is a prime number
179713

Join Cramster's Community

Cramster.com brings together students, educators and subject enthusiasts in an online study community. With around-the-clock expert help and a community of over 100,000 knowledgeable members, you can find the help you need, whenever you need it. Join for free today » How Cramster is different from tutoring »