A nine digit number has the property where the first digit equals the number of zeros and ones used in the number, the second digit equals the number of ones and twos used in the number, the third digit equals the number of twos and threes used in the number, etc. through the ninth digit equals the number of eights and nines used in the number. What could the number be?

A ten digit number has a similar property to the nine digit number. The first digit equals the number of zeros and ones used in the number, the second digit equals the number of ones and twos used in the number, etc. through the ninth digit. And also, the tenth digit equals the number of zeros and nines used in the number. What could this number be?

(In reply to re: Computer program solution by Ken Haley)

Ken,

On my system your program ran in 24 seconds. About 12 times faster than mine. Not bad.

I'll make a study of it. Thanks.

 

Posted by Penny on 2005-09-24 09:26:05