Arithmetic Means

Which of the following three numbers are arithmetic means of 14 and 50?

• 24, 34, 44

• 20, 31, 42

• 23, 32, 41

• 21, 32, 43

Insert two arithmetic means of 55 and 118.

• 80 and 82

• 76 and 97

• 70 and 100

• 78 and 96

There are 7 arithmetic means between a₁ and a₉

• True

• False

Find the missing term in the arithmetic sequence 9, ___, 3.

• 4

• 6

• 5

• 7

Insert 3 arithmetic means in the sequence 10, ___, ___, ___, 130.

• 40, 70, 100

• 30, 60, 90

• 50, 80, 110

• 20, 60, 120

Given the arithmetic sequence

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

• 8

• 10

• 9

• 11

An arithmetic mean is any term that lies between any two consecutive terms of an arithmetic sequence.

• True

• False

Insert four arithmetic means between -5 and 20.

Insert three arithmetic means between 12 and 44.

Insert three arithmetic means between

a₅= -40 and a₉=-20