Question 34

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 from the rest.

Solution

120 : 300 = 30 x 4 : 30 x 10

28 : 70 = 7 x 4 : 7 x 10

16 : 40 = 4 x 4 : 4 x 10

320 : 480 = 80 x 4 : 80 x 6

All number-pairs except 320 : 480 are 4th and 6th multiples of a number

$$\therefore\ $$320 : 480 is the odd one among the given number-pairs

Hence, the correct answer is Option C

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