Test3 - MAS4214 Test 3 Question 1 Suppose that 21x 14 mod...

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MAS4214: Test 311/09/2016Question 1Suppose that21x14 mod 28, what is the congruence class ofxmodulo4?[2pt]
Question 2Is there an integerxsuch that21x13 mod 28? (Justify your answer). [2pt]
Question 3Find an inverse of3modulo13in{1,· · ·,12}. [2pt]
13.Question 4What is the cardinality ofU1300? [2pt]
Question 5Supposegcd(x,1300) = 1andx∈ {0,· · ·,1299}, what isx481mod 1300? [2pt]

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