Evaluate: $220 + 221$

437

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441

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21^{2}

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None of these

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Solution

The correct options are
A $441$
D $21^{2}$
$220 + 221 = 441$
Also, we know $441$ is a square of $21$ because $21 \times 21 = 441$
Hence, options B and C are correct.

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