of change between the numbers. In other words, do the numbers increase

or decrease, and by how much

Look at this series: 21, 9, 21, 11, 21, 13, 21, … What number should come next?

A. 14

B. 15

C. 21

D. 23

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Look at this series: 58, 52, 46, 40, 34, … What number should come next?

A. 26

B. 28

C. 30

D. 32

## View Answer

### Answer & Explanation:

Answer: Option B

Explanation:

This is a simple subtraction series. Each number is 6 less than the previous number.

Look at this series: 3, 4, 7, 8, 11, 12, … What number should come next?

A. 7

B. 10

C. 14

D. 15

## View Answer

### Answer & Explanation:

Answer: Option D

Explanation:

This alternating addition series begins with 3; then 1 is

added to give 4; then 3 is added to give 7; then 1 is added, and so on.

Look at this series: 8, 22, 8, 28, 8, … What number should come next?

A. 9

B. 29

C. 32

D. 34

## View Answer

### Answer & Explanation:

Answer: Option D

Explanation:

This is a simple addition series with a random number, 8,

interpolated as every other number. In the series, 6 is added to each

number except 8, to arrive at the next number.

Look at this series: 31, 29, 24, 22, 17, … What number should come next?

A. 15

B. 14

C. 13

D. 12

## View Answer

### Answer & Explanation:

Answer: Option A

Explanation:

This is a simple alternating subtraction series, which subtracts 2, then 5.