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Tianjin primary school mathematics
Either way, one egg is missing, so if there is another egg, it can be counted accurately, so the number of eggs after adding one is not only a multiple of 3, but also a common multiple of 4,5, that is, a common multiple of 3,4,5. The common multiple of 3,4,5 is 60, 120,180,240,300, so the total is 300- 1=299.