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Difficulty: 2 of 5 Latest: 2 absent digits
The product of 722*227 (163,894) contains neither 2 nor 7. List all the couples (b,c; b>c) such that the product bcc*ccb contains neither b nor c. Bonus: From the above list select couples, if any, using none of the corresponding digits in the partial products as well.
(No Solution Yet, 0 Comments) Submitted on 2020-11-28 by Ady TZIDON   
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