Identifying Pattern of Arithmetic and Geometric Sequence

What kind of sequence is illustrated below?
 400, 200, 100, 50, 25, ...

• Arithmetic

• Geometric

• Neither

Determine whether the sequence is arithmetic, geometric, or neither.

• arithmetic

• geometric

• neither

What number follows 20 in this arithmetic sequence?

8,11, 14, 17, 20

• 5

• 23

• 26

• 29

In a geometric sequence, if a1 = 3 and r = 2, what is the value of a6?

• 96

• 48

• 192

• 64

• Arithmetic

• Geometric

Answer explanation

Percentages are almost always Geometric.

• Arithmetic

• Geometric

Answer explanation

Percentages are almost always Geometric.

Find the 16th term of the sequence 1, 5, 9, 13, ...

• 60

• 61

• 64

• 65

An arithmetic sequence is given below.

2, 9, 16, 23, ...

Which is the explicit formula for the n^th term a_n?

(Look at the choices carefully! You may have to simplify your equation to get the correct choice!)

• a_n = -7n+9

• a_n = 7n-5

• a_n = 7n-9

• a_n = -7n+5

Which number is missing in this pattern? 
62, 68, 76, 82, 90, 96 ___, 110

• 102

• 106

• 104

• I don't know

Hayley has a garden and likes to put flowers from her garden into pretty vases. Hayley put 19 flowers in the first vase, 38 flowers in the second vase, 57 flowers in the third vase, and 75 flowers in the fourth vase. What kind of sequence is this?

• Geometric

• Arithmetic

• Both

• Neither