LeCun GPU Selection

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Yann LeCun is buying GPUs for his workstation PC. Three of his friends have shops that sell GPUs of different memory size configurations. He wishes to buy at least one card from all his friends' shops. To make memory management easy, it is best that LeCun buys the GPUs such that they have as similar memory sizes as possible (smallest range). Given the various memory sizes (in GB) that each of the

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