Geometric and Arithmetic Mean

What are the possible values for the missing term in this geometric sequence.

• 8 or 2

• 8 or -8

• -8 or -2

• 16 or -16

Which kind of sequence has a common ratio?

• Arithmetic

• Geometric

Given the arithmetic sequence 32, ___, ___, ___, 68 whose arithmetic means are missing, what is the value of d or the common difference?

• 8

• 10

• 9

• 11

• Arithmetic

• Geometric

Answer explanation

Percentages are almost always Geometric.

What is a sequence of numbers in which each term after the first is obtain by multiplying the preceding term by constant number?

• harmonic sequence

• arithmetic sequence

• geometric sequence

Insert a geometric mean between 10 and 90.

• 45

• 40

• 60

• 30

Insert two geometric mean between the numbers 6 and 162

• 18 & 54

• 20 and 25

• 12 & 24

• 24 & 96

Insert two geometric mean between 1 and 125.

• 25 and 75

• 10 & 50

• 5 & 25

• 16 and 64

Insert geometric mean between 4 and 64

• 8

• 16

• 24

• 32

Insert two geometric mean between the numbers 2 and 16

• 4 & 8

• 8 & 12

• 3 & 9

• 5 & 10