ILLUSTRATION 1

Which of the numbers given below would come next in the series of numbers? 1,9, 25, _

(a) 36 (b) 25

(c) 49 (d) none of these

Solution

The first number is 1, second is 9 and third is 25. We can easily observe that the numbers in the series are squares of consecutive odd numbers. Hence, the next number would be the square of 7 which would be 49. Thus Option (c) is correct.