Quiz on Arithmetic and Geometric Sequences

What is the common difference in the arithmetic sequence 2, 4, 6, 8?

• 8

• 2

• 4

• 6

Which of the following is a geometric sequence?

• 2, 4, 6, 8

• 3, 9, 27, 81

• 7, 14, 21, 28

• 5, 10, 15, 20

What is the formula for the nth term of an arithmetic sequence?

In the sequence 3, 7, 11, 15, what is the rule?

How do you find the 4th term of the geometric sequence 2, 6, 18, 54?

What is the common ratio in the geometric sequence 5, 15, 45, 135?

• 45

• 5

• 3

• 15

Which sequence is arithmetic?

• 3, 9, 27, 81

• 10, 20, 30, 40

• 2, 4, 8, 16

• 5, 15, 45, 135

What is the 7th term of the arithmetic sequence 20, 30, 40, 50?

(challenge: write the rule)

• 70

• 60

• 80

• 50

What is the 5th term of the geometric sequence 2, 6, 18, 54?

(challenge: write the rule)

• 162

• 108

• 54

• 324

What is the key difference between arithmetic and geometric sequences?

• Arithmetic sequences have no pattern, geometric sequences have a pattern.

• Arithmetic sequences multiply by a constant, geometric sequences add a constant.

• Arithmetic sequences add a constant, geometric sequences multiply by a constant.

• Arithmetic sequences are always increasing, geometric sequences are always decreasing.