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
In all the pairs of numbers, the second number is prime multiple of first number. 15: 285 → 285 ÷ 15 = 19 21: 273 → 273 ÷ 21 = 13 16: 272 → 272 ÷ 16 = 17 17: 204 → 204 ÷ 17 = 12
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