Fill in the blank to complete the series: 9, 3, 1, (1/3), _____

2019

Answer: D. 1/9 — Each term is divided by 3: 9, 3, 1, 1/3, 1/9. Therefore the missing term is 1/9.

1. A.

   1/6

2. B.

   1/12

3. C.

   1/4

4. D.

   1/9

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