SOLUTION: What comes next on this number line ? 2,6, __, 54, 162

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Question 897049: What comes next on this number line ?
2,6, __, 54, 162
Answer by CubeyThePenguin(3113) About Me  (Show Source):
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2, 6, ___, 54, 162

6/2 = 3
162/54 = 3

The common ratio is 3, so the finished number line is:

2, 6, 18, 54, 162