1, 9, 25, 49, ?, 121

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Solution

The correct option is B 81
The given series consists of squares of consecutive odd numbers i.e. $1^{2}, 3^{2}, 5^{2}, 7^{2}, . . . . .$
So, missing term = $9^{2} = 81$ .

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1, 9, 25, 49, 81, ?

1, 9, 25, 49, ?, 121

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