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What is the remainder when 2 + 4 + 6 + ... + 100 + 102 + 104 is divided by 7?

 Jan 29, 2022
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Sum of the 52 entries in the series  is     52/2 ( 2 + 104)  =  2756      2756 mod 7 = 5

 Jan 29, 2022

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