Question

Find the common ratio for this geometric sequence.

0.25, 1.25, 6.25, 31.25, ...
A.
0.20
B.
1
C.
–5
D.
5

Answer 1

• D) 5

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Given

• GP: 0.25, 1.25, 6.25, 31.25, ...

To find

• The common ratio of this GP

Solution

The common ratio is the constant factor between consecutive terms, that is:

• r = 31.25/6.25 = 6.25/1.25 = 1.25/0.25 = 5

Correct choice is D.