Question

1, 9, 25, ?, 361, 841, 1681​

Answer 1

Answer:

121

Step-by-step explanation:

(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.

I TRIED MY BEST TO HELP U..HOPE IT HELPS U

Answer 2

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.