Question
Does there exist a perfect square that ends with the digits `...2017`?
Difficulty level (1 very easy - 10 very hard): 2
Topics:
Number Theory
->
Modular Arithmetic / Remainder Arithmetic
Number Theory
->
Division
->
Parity (Even/Odd)
Combinatorics
->
Case Analysis / Checking Cases
->
Processes / Procedures
Proof and Example
->
Proof by Contradiction
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