Question 18

In the following question, select the odd number pair from the given alternatives.

Solution

The logic here is

226 = 15$$^2$$ + 1

257 = 16$$^2$$ + 1

325 = 18$$^2$$ + 1

360 = 19$$^2$$ - 1

All the number pairs are in the form of (n - n$$^2$$+1) except 19 - 360.

$$\therefore\ $$19 - 360 is the odd one among the given number pairs.

Hence, the correct answer is Option C

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