Arithmetic and Geometric Sequences

Find the common difference:

25, 13, 1, -11, ...

• 12

• -12

• 8

• -8

Find the common ratio:

2, 8, 32, 128, ...

• 1/4

• 4

• 1/6

• 6

Find the next term:

100, 65, 30, -5...

• 20

• -20

• 40

• -40

What are the first three terms of the sequence defined by the following equation?
a_n = 7 + (n - 1)5

• 7, 35, 175

• 7, 2, -3

• 12, 17, 22

• 7, 12, 17

What is the 8th term in the sequence below?
3, 9, 27, 81, ...

• 19,683

• 6,561

• 2,187

• 729

What is the term position of 31,250 in the following geometric sequence?

• a₅

• a4

• a₂₀

• a₇

What is the term position of 31,104 in the following geometric sequence? 4, 24, 144,...

• a₅

• a₈

• a₆

• a₇

Is this sequence arithmetic, geometric, or neither?
{26, 22, 18, 14, ...}

• Arithmetic

• Geometric

• Neither

These are the first three terms of an arithmetic sequence:
{½,  ¾,  1,  ... }
What are the fourth and fifth terms of the sequence?

• 5/4,  7/4

• 5/4,  3/2

• 3/2,  5/2

• 3/2,  2

What is the common difference in this sequence?
{48, 32, 16, 0, ... }

• 1/2

• 2

• -8

• -16