A building has 23 floors and each floor consists of 11 apartments. Calculate the total number of apartments in the building.

124

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321

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237

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253

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Solution

The correct option is D 253
Number of floors = 23
Number of apartments on each floor = 11

Therefore, total number of apartments
$= Number of floors \times$
$Number of apartments in each floor$

$= 23 \times 11$

Let's calculate the final value by using the grid method.

Hence, the total number apartments in the building
= 200 + 30 + 20 + 3
= 253

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