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2 absent digits (Posted on 2020-11-28) |
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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.
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Submitted by Ady TZIDON
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Rating: 2.0000 (1 votes)
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