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In any set of 181 square integers, prove that one can always find a subset of 19 numbers, sum of whose elements is divisible by 19

phani sri niketan reddy , 15 Years ago
Grade Upto college level
anser 1 Answers
manu saxena

Hint: Note that there are just 10 quadratic residues in modulo 19; we can ?nd 19squares having the same remainder upon division by 19

Last Activity: 15 Years ago
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