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Getting the right count (Posted on 2015-07-14) Difficulty: 2 of 5
Find the total number of positive integers n not over 2015 such that n^4+5n^2+9 is divisible by 5.

Source: SMO, slightly modified

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (1 votes)

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  Subject Author Date
SolutionAnalytical SolutionSteve Herman2015-07-14 10:05:06
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