$66^{2} - 34^{2} = ?$

3600

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3200

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2146

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2466

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None of these

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Solution

The correct option is B 3200
Here, this expression is based upon
$a^{2} - b^{2} = (a + b) (a - b)$
So, $66^{2} - 34^{2} = (66 + 34) (66 - 34)$
$= 100 \times 32 = 3200$

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