**1, 9, 25, ?, 361, 841, 1681(This is not correct series.)**

**Correct Series is:**

**1, 25, ?, 361, 841, 1681**

**Options:**

(a) 169

(b) 225

(c) 161

(d) 121

**Best Answer-**

(1)^2=1

(5)^2=25

(11)^2=121

(19)^2=361

(29)^2=841

(41)^2=1681

Now,

5-1=4

11-5=6

19-11=8

29-19=10

41-29=12

Consecutive Even Number Series:

4, 6, 8, 10, 12

Therefore, 121 is the correct answer.

## 0 Comments