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I Got Your Number (Posted on 2004-04-18) Difficulty: 3 of 5
Lou Zerr is trying to pick up a woman at a bar. The woman, Denise, is reluctant to give out her number, but she gives Lou a clue.

"My sister, Elise and I have the same digits in our phone numbers, just in reverse order. Elise's number is also evenly divisible by mine."

What is Denise's phone number?

(Note: this IS NOT a real exchange, as far as I know. Assume the phone number has 10 digits: 7 digit number + 3 digit area code.)

No Solution Yet Submitted by Bob Genisot    
Rating: 3.6000 (5 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(4): Another non-trivial solution | Comment 8 of 15 |
(In reply to re(3): Another non-trivial solution by Penny)

My lawyer/engineer brother confirms that "evenly divisible by" just means "divisible by, with no remainder". So 9 is evenly divisible by 3. (9 is not oddly divisible by 3).

 

 

 

 

 

 

 

 

 

  

Edited on April 19, 2004, 12:10 pm
  Posted by Penny on 2004-04-19 12:10:02

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