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| Equality of ends (Posted on 2012-03-04) |
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How many six-digit integers have the sum of their two leftmost digits equal to the sum of their two rightmost digits?
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Submitted by Ady TZIDON
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Rating: 4.0000 (1 votes)
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Solution:
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There are 61,500 different six-digit numbers such that the the sum of the leftmost pair of digits equals the sum of the rightmost pair (see DejMar for detailed solution),
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Subject |
Author |
Date |
 | answer | Dej Mar | 2012-03-04 12:28:37 |
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