What is the common ratio for the sequence of numbers 2, 6, 18, 54?
Answer
A
9
B
3
C
4
D
27
Explanation
Divide each term by the term before it: 6 ÷ 2 = 3, 18 ÷ 6 = 3, and 54 ÷ 18 = 3. Since the same ratio occurs each time, the common ratio is 3, choice B.
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