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tmua.fyi Mock Paper 2 (2) · Q11

Paper 2Logic & proofNumber & counting

For a positive integer nn, the statement ‘n2≡1(mod8)n^2\equiv1\pmod8’ is true if and only if:

Ann is even
Bnn is prime
C44 divides nn
Dnn is odd
En≡1(mod8)n\equiv1\pmod8

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