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Secret Number

Choose or fin...

Question

Choose or find odd number pair
$(81 - 63), (24 - 48), (21 - 15), (13 - 39)$

A

81 - 63

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B

24 - 48

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C

21 - 15

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D

13 - 39

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Solution

The correct option is A $81 - 63$
This is the only group in which the sum of the digit of both the numbers is the same.

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