Complete the series. 1, 27, 125, ?
343
Express each term as a cube: \(1 = 1^3\), \(27 = 3^3\), \(125 = 5^3\).
The bases are the consecutive odd numbers 1, 3, 5, so the next base is 7.
Therefore the next term is \(7^3 = 343\).
Hence, the answer is 343.
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