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Choose or find odd number pair

(42 - 4), (36 - 6), (32 - 2), (15 - 5)

Option:
A. 42 - 4
B. 36 - 6
C. 32 - 2
D. 15 - 5
Answer: A . 42 - 4

Justification:

In all the pairs except (a), the first number is a multiple of the second.
Hence, the answer is (a).

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