WAEC Mathematics 2014 Objective — Question 49
Question 49 of 50 from the West African Examinations Council (WAEC) Mathematics 2014 Objective paper, with the correct answer and a full explanation.
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In what modulus is it true that 9+8=5?
- A. mod 10
- B. mod 11
- C. mod 12Correct
- D. mod 13
Explanation
9+8=17. 17 mod 12 = 5, since 17=1×12+5.
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