Question

Find out the wrong term in the series 1, 5, 9, 15, 25, 37, 49

• A. 15
• B. 49
• C. 25
• D. 37

Answer 1

The correct option is A 15

The terms of the given series is $1\times 1,2\times 2+1,3\times 3,4\times 4+1,5\times 5,6\times 6+1,.....$
So, 15 is wrong and must be replaced by $(4\times 4+1)=17$