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The Consumer Price Index (CPI) measures the average change in prices over time that consumers pay for a basket of goods and services and is a key indicator of inflation.
What will come in place of the question mark (?) in the following series?
3.5, 9.5, 27.5, 81.5, 243.5, 729.5, ?
8, 9, 125, ?, 1331, 169
17, 9, ?, 13.5, 25, 65
1, 6, 27, 124, ?, 3906, 27391
...12, 11, 20, 57, 224, 1015
10, 18, 53, 115, 204, ?
33 41 25 49 17 ?
12, 19, 32, ?, 76, 107
156, 182, 210, 240, 272, ?
945, 1890, ?, 504, 144, 32