Number Series Practice


Number Series Practice Questions

Tests such as the Ontario Police, Canadian Armed Forces Entrance Test, COOP, HSPT

Number Series Tutorial

Number Sequences (Algebraic)

 

1. Consider the following series: 6, 12, 24, 48. What number should
come next?
a. 48
b. 64
c. 60
d. 96

2. Consider the following series: 5, 6, 11, 17. What number should
come next?
a. 28
b. 34
c. 36
d. 27

3. Consider the following series: 26, 21, …, 11, 6. What is the missing
number?
a. 27
b. 23
c. 16
d. 29

4. Consider the following series:23, …, 31, 37. What is the missing
number?
a. 19
b. 27
c. 29
d. 30

5. Consider the following series: 3, 6, 11, 18. What number should
come next?
a. 30
b. 27
c. 22
d. 29

6. Consider the following series: 26, 24, 20, 14. What number should
come next?
a. 6
b. 18
c. 12
d. 8

7. Consider the following series: 6, 8, 4, 10, 18, 22. What number
should come next?
a. 34
b. 32
c. 24
d. 26

8. Consider the following series: L, O, R, …, X. What is the missing
letter?
a. S
b. U
c. T
d. M

9. Consider the following series: X, Z, B, D. What number should
come next?
a. E
b. F
c. G
d. H

10. Consider the following series: 25, 33, 41, 49. What number
should come next?
a. 51
b. 55
c. 59
d. 57

Answer Key

1. D
The numbers double each time.

2. A
Each number is the sum of the previous two numbers.

3. C
The numbers decrease by 5 each time.

4. C
The numbers are primes (divisible only by 1 and themselves).

5. B
The interval, beginning with 3, increases by 2 each time.

6. A
The interval, beginning with 2, increases by 2, and is subtracted each time.

7. B
Each number is the sum of the previous and the number 2 places to the
left.

8. B
There are two letters missing between each one, so U is next.

9. B
Miss a letter each time and ‘loop’ back, so F is next.

10. D
The numbers increase by 8.

 

Written by:
Modified: September 13th, 2017
Published: May 12th, 2014

5 thoughts on “Number Series Practice”

    1. Here is the sequence 6, 8, 4, 10, 18, 22.

      so – it is the sum of the number and the number 2 spaces back. Starting at 4 as we don’t know the number before 6, 6 + 4 = 10, then 8 + 10 = 18, and 22 + 10 = 32.

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