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Wonderful question! The population of London is about 8 million. On average, there are less than 3 people per house nowadays, so there must be almost 3 million houses. It might take (very roughly) 20 000 bricks to build a house. That would make 60 000 000 000 (sixty thousand million) bricks in total. It would be reasonable to double or triple this figure to allow for the myriad other uses of bricks in a city. So we are looking at at least 12 figures - hundreds of thousands of millions.

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17y ago

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