Number series: geometric series, multiply or divide by a fixed number

1. A.
   16
2. B.
   20
3. C.
   18
4. D.
   24

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1. A.
   $\left[\frac{1}{32}\right]$
2. B.
   $\left[\frac{1}{44}\right]$
3. C.
   $\left[\frac{1}{48}\right]$
4. D.
   $\left[\frac{1}{42}\right]$

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1. A.
   60.27
2. B.
   78.91
3. C.
   47.89
4. D.
   49.152

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1. A.
   7.2
2. B.
   8.1
3. C.
   6.0
4. D.
   6.6

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1. A.
   243
2. B.
   218
3. C.
   270
4. D.
   261

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1. A.
   180
2. B.
   200
3. C.
   270
4. D.
   300

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1. A.
   1, 1
2. B.
   2, 1
3. C.
   1, 0.2
4. D.
   0.5, 0.1

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1. A.
   10
2. B.
   12.5
3. C.
   13.5
4. D.
   14

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1. A.
   10
2. B.
   5
3. C.
   15
4. D.
   1

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1. A.
   72
2. B.
   80
3. C.
   81
4. D.
   90

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