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Fig. 1 and Fig. 2 are the addition and multiplication tables respectively in modulo 5....

Mathematics
WAEC 2017

Fig. 1 and Fig. 2 are the addition and multiplication tables respectively in modulo 5. Use these tables to solve the equation (n \(\oplus 4\))

  • A. 1
  • B. 2
  • C. 3
  • D. 4
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Correct Answer: Option C
Explanation

(n \(\oplus\) 4) \(\oplus\) 3 = 0 (mod 5)

(3 \(\oplus\) 4) \(\oplus\) 3

12 \(\oplus\) 3 = 15 (mod 5)

(5 x 3 + 0) = 0 (mod 5)

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