Geometric Sequences

What is the common ratio of the geometric sequence:

2,10,50,250,1250,...

What is the common ratio of the geometric sequence:

1,-4,16,-64,256,...

What is the common ratio of the geometric sequence:

3, 4.5, 6.75, 10.125,...

What is the common ratio of the geometric sequence:

100, 60, 36, 21.6,12.96,...

What is the common ratio of the geometric sequence:

 $1,\ \frac{3}{4},\ \frac{9}{16},\ \frac{27}{64},...$  

Identify if the sequence is arithmetic, geometric or neither:

-2.5, -5, -10, -20, -40,...

• Arithmetic

• Geometric

• Neither

Identify if the sequence is arithmetic, geometric or neither:

3, 6, 18, 72, 360,...

• Arithmetic

• Geometric

• Neither

Identify if the sequence is arithmetic, geometric or neither:

1,3,9,27, 81,...

• Arithmetic

• Geometric

• Neither

Identify if the sequence is arithmetic, geometric or neither:

4,8,12,16,20,...

• Arithmethic

• Geometric

• Neither

Identify if the sequence is arithmetic, geometric or neither:

2.5, 7.5, 22.5, 67.5,...

• Arithemtic

• Geometric

• Neither