Answers

2016-03-27T09:13:22+05:30
81-63 & 21-15 & 13-69 are odd pairs Because there are odd numbers 24-48 is even pair Because they are even numbers
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2016-03-27T09:18:42+05:30
I believe its 81-63 21-15 and one more pair is odd so the odd one should be 24-48
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