Question 49

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waecmaths question: 

In what modulus is it true that 9 + 8 = 5

Option A: 

mod 10

Option B: 

mod 11

Option C: 

mod 12

Option D: 

mod 13

waecmaths solution: 

Add 9 + 8 gives 17, in mod 12, the remainder when 17 is divided by 12 is 5. so mod 12 is the correct option

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