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| Get the last digit (Posted on 2011-01-17) |
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Let A=2^n+3^n+7^n
For a given positive integer n what is the last digit of A?
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Submitted by Ady TZIDON
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Rating: 4.0000 (2 votes)
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Solution:
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(Hide)
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If n mod 4 is 1 or 2 ,the last digit is 8, else it is 2. |
Comments: (
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Subject |
Author |
Date |
 | No Subject | Charlie | 2011-01-17 18:14:02 |
| Solution | Kenny M | 2011-01-17 16:01:52 |
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