Created
January 10, 2014 18:32
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ROTW: 1/10/2014
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Part A) Farewell | |
At a train station, the Porter family is saying goodbye to the Robinson family. | |
We don't know who is leaving and who is staying. | |
Each of the members of the Porter family say farewell to each of the members of the | |
Robinson family. To say goodbye, two men shake hands, and both a man and woman and two | |
women kiss once on the cheek. | |
An eyewitness to event counted 21 handshakes and 34 kisses. How many men and how many | |
women were saying goodbye? | |
***Programming Problem*** | |
Part B) The Dividing End | |
My ID number is quite remarkable. It's a nine-digit number with each of the digits 1 to 9 | |
appearing once. The whole number is divisible by 9. If you remove the rightmost digit, the | |
remaining eight-digit number is divisible by 8. Removing the next rightmost digit leaves a | |
seven-digit number that is divisible by 7. The property continues all the way down to | |
one digit. What is my ID number? | |
* Your answer must be accompanied by some code, preferably in your own gist | |
** CODE GOLF: Extra credit (and I do have a prize) goes to the person who can do this | |
in the fewest number of lines | |
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