Question

Find the missing number in the series 9, 25, 49, _____ , 169
(1) 100
(2) 121
(3) 64
(4) 144

Answer 1

Hey MATE!

The given numbers are all square of odd numbers : 3² , 5² , 7² ____ 13²

Now 2 numbers can come at the balnk space ie., 9² or 11².

Since only 121 is given in the options and 81 is absent from it, so your answer is 121 which is 11².

Hope it helps

Hakuna Matata :))

Answer 2

In this question , if we observe properly, we can see that,

All of the numbers are square of prime numbers.

9 = ( 3)²

25 =(5)²

49 = ( 7 )²

121 = ( 11)²

169 + ( 13)²

Hence the missing number will be 121.

Ans :- The missing number will be 121. And the series will be  9, 25, 49, 121, 169.

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