$3$ $5$ $7$ $9$ $15$ $13$
$8$ $26$ $48$ $82$ ? $170$
Find the missing number in above figure :

121

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224

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120

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225

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Solution

The correct option is C $224$
$3^{2} - 1 = 8; 5^{2} + 1 = 26; 7^{2} - 1 = 48; 9^{2} + 1 = 82; 15^{2} - 1 = 224; 13^{2} - 1 = 170;$ .
$∴$ The solution is $224$ .

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