Question
Four number-pairs have been given, out of which three
are alike in some manner and one is different. Select the number-pair that is different.Solution
1) 49 – 23 = (4 X 9) - (4 + 9) = 36 – 13 = 23 2) 76 – 38 = (7 X 6) - (3 + 8) = 42 – 11 = 31 3) 67 – 29 = (6 X 7) - (6 + 7) = 42 - 13 = 29 4) 39 – 15 = (3 X 9) - (3 + 9) = 27 - 12 = 15
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