Four Arizona Zip Codes Make BusinessWeek List

On 2 April 2007, posted a "Special Report" titled: "The Richest Zip Codes-- and How They Got That Way." A list of 275 zip codes was sorted by state and four Arizona zip codes were found. [Note: There were no zip codes from other states whose names start with the letter 'A'.]

   city             zip code   median price   prime factors
   Paradise Valley    85253        $1,850,000    7,19,???
   Scottsdale         85262        $  886,000    2,???,479
   Scottsdale         85255        $  835,000    5,17,17,59
   Scottsdale         85259        $  825,000    is prime
  1. The prime factors for 85253 are ______________.

  2. The prime factors for 85262 are ______________.

  3. Zip code 85259 is an off-by-one palindromic five-digit zip code. Explain.

Help... What's a Palindrome?

A palindrome is a word, phrase, number or other sequence of units that has the property of reading the same in either direction.

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Creator: Gerald D. Thurman []
Created: 02 April 2007

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