Question 47

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the odd one.

Solution

The logic here is

26 = 25 + 1 = 5$$^2$$ + 1

17 = 16 + 1 = 4$$^2$$ + 1

122 = 121 + 1 = 11$$^2$$ + 1

Second number is the sum of square of first number and 1.

In 13 : 175, second number is not sum of square of first number and 1.

$$\therefore\ $$13 : 175 is odd one among the given number-pairs

Hence, the correct answer is Option B

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