What you will learn
- Describe a number pattern and say its rule.
- Continue a pattern, find missing numbers and spot mistakes.
- Make your own number pattern and explain its rule.
Patterns are everywhere: in hopscotch squares, in the steelpan, and in numbers too. A number pattern is a list of numbers that follows a rule. If you know the rule, you can work out any number in the pattern. In this lesson you will become a pattern detective.

What is the rule?
Look at this pattern:
1, 6, 11, 16, 21
To find the rule, look at how you get from one number to the next. 1 to 6 is 5 more. 6 to 11 is 5 more. The rule is start at 1 and add 5. The next number is 26.
Patterns can go down too: 9 000, 8 500, 8 000, 7 500. The rule is start at 9 000 and subtract 500.
Always check the rule works for every step, not just the first one.
Patterns with times tables
Counting in sixes, 6, 12, 18, 24, 30, is a pattern from the 6 times table. The rule is add 6.
Some patterns multiply. In 2, 4, 8, 16, 32 each number is double the one before. The rule is multiply by 2. In 3 200, 1 600, 800, 400 each number is half the one before. The rule is divide by 2.
Worked example
Find the rule and the next number: 5, 10, 20, 40, ___
Show me how
5 to 10 is add 5. But 10 to 20 is add 10, so adding the same number does not work.
Try multiplying: 5 × 2 = 10, 10 × 2 = 20, 20 × 2 = 40. It works every time.
The rule is multiply by 2. The next number is 40 × 2 = 80.
Missing numbers and mistakes
To find a missing number, first find the rule using numbers that are next to each other.
Worked example
Find the missing number: 250, 500, ___, 1 000, 1 250
Show me how
500 − 250 = 250, and 1 250 − 1 000 = 250.
The rule is add 250.
500 + 250 = 750. The missing number is 750.
Sometimes a pattern has a mistake. In 7, 14, 21, 27, 35 the rule is add 7, but 21 + 7 is 28, not 27. The 27 is the mistake.
Watch out! A common mistake
Do not find the rule from only the first two numbers. In 2, 4, 8, 16 the first step is add 2, but the next step is add 4. Check every step before you decide on the rule.
Make your own pattern
To make a pattern, choose a start number and a rule. For example: start at 100 and add 25. The pattern is 100, 125, 150, 175, 200.
When you share your pattern, always say the rule so someone else can check it.
Try it
TRY ITPattern detective
Choose a game and tap the right answer.
TRY ITPattern maker
Choose a start number and a rule. The pattern maker shows the first six numbers of your pattern.
Let’s practise
Work out each one in your copybook. Open Hint if you are stuck, then open Show answer to check your working.
1. Write the next two numbers: 3, 7, 11, 15, ___, ___
Hint
What is added each time?
Show answer
The rule is add 4: 19, 23.
2. Write the next two numbers: 5 000, 4 900, 4 800, ___, ___
Hint
Is it going up or down?
Show answer
The rule is subtract 100: 4 700, 4 600.
3. What is the rule? 4, 8, 16, 32, 64
Hint
Adding the same number does not work. Try multiplying.
Show answer
Start at 4 and multiply by 2.
4. Find the missing number: 1 500, 2 000, ___, 3 000
Hint
Find the jump first.
Show answer
The rule is add 500. The missing number is 2 500.
5. Find the mistake: 9, 18, 27, 35, 45, 54
Hint
Count in nines.
Show answer
35 is wrong. It should be 36.
6. Write the first five numbers of the pattern: start at 10 and add 9.
Hint
Add 9 each time.
Show answer
10, 19, 28, 37, 46
7. (a) 6 400, 3 200, 1 600, ___
(b) 8, 16, 24, ___
(c) 120, 110, 100, ___
Hint
Find each rule first.
Show answer
(a) Divide by 2: 800
(b) Add 8: 32
(c) Subtract 10: 90
8. Make your own pattern with five numbers. Write its rule.
Hint
Choose a start number and a rule.
Show answer
Many answers are possible, for example start at 50 and add 50: 50, 100, 150, 200, 250.
Quiz
Lesson quiz: 10 questions
Answer every question, then press Check my answers. Score 8 or more to earn the Pattern Finder badge.
Number patterns and rules: worksheet
Name: ____________________ Date: ______________
Part A: Let’s practise
1. Write the next two numbers: 3, 7, 11, 15, ___, ___
2. Write the next two numbers: 5 000, 4 900, 4 800, ___, ___
3. What is the rule? 4, 8, 16, 32, 64
4. Find the missing number: 1 500, 2 000, ___, 3 000
5. Find the mistake: 9, 18, 27, 35, 45, 54
6. Write the first five numbers of the pattern: start at 10 and add 9.
7. (a) 6 400, 3 200, 1 600, ___
(b) 8, 16, 24, ___
(c) 120, 110, 100, ___
8. Make your own pattern with five numbers. Write its rule.
Part B: Quiz
1. What comes next? 2, 7, 12, 17, ___
(a) 21
(b) 22
(c) 23
(d) 27
2. What is the rule? 600, 550, 500, 450
(a) add 50
(b) subtract 50
(c) subtract 100
(d) divide by 2
3. Find the missing number: 1 200, 1 400, ___, 1 800
4. The rule for 3, 6, 12, 24 is add 3.
True or False? Circle one: True / False
5. Which number is the mistake? 8, 16, 24, 30, 40
(a) 16
(b) 24
(c) 30
(d) 40
6. What comes next? 1, 10, 100, ___
7. Start at 7 and add 7. What is the fourth number?
(a) 21
(b) 28
(c) 35
(d) 14
8. In the pattern 4 000, 3 750, 3 500, 3 250, the rule is subtract 250.
True or False? Circle one: True / False
9. What comes next? 9 995, 9 996, 9 997, 9 998, ___
10. Which pattern has the rule “divide by 2”?
(a) 100, 98, 96, 94
(b) 80, 40, 20, 10
(c) 10, 20, 40, 80
(d) 80, 60, 40, 20
Answers (for the adult)
Part A
1. The rule is add 4: 19, 23.
2. The rule is subtract 100: 4 700, 4 600.
3. Start at 4 and multiply by 2.
4. The rule is add 500. The missing number is 2 500.
5. 35 is wrong. It should be 36.
6. 10, 19, 28, 37, 46
7. (a) Divide by 2: 800
(b) Add 8: 32
(c) Subtract 10: 90
8. Many answers are possible, for example start at 50 and add 50: 50, 100, 150, 200, 250.
Part B
1. (b) 22
2. (b) subtract 50
3. 1 600
4. False
5. (c) 30
6. 1 000
7. (b) 28
8. True
9. 9 999
10. (b) 80, 40, 20, 10
Recap
- A number pattern follows a rule, such as add 5, subtract 100 or multiply by 2.
- To find the rule, look at how you get from each number to the next.
- Check the rule works for every step.
- Use the rule to find missing numbers and to spot mistakes.
- To make a pattern, choose a start number and a rule, and always say the rule.
Words to know
- pattern
- Numbers or shapes that follow a rule.
Example: 2, 4, 6, 8 is a pattern. - rule
- What you do to get from one number to the next.
Example: The rule for 2, 4, 6, 8 is add 2. - term
- One of the numbers in a pattern.
Example: In 5, 10, 15, the third term is 15. - double
- To multiply by 2.
Example: Double 40 is 80. - halve
- To divide by 2, or split into two equal parts.
Example: Half of 800 is 400.
Try it at home
- Look for number patterns at home and outside: house numbers on one side of a street, page numbers, or a calendar. Write down the rule for each one.
- Mini project: make a pattern poster. Choose three different rules, write the first six numbers of each pattern, and ask someone at home to work out your rules.
Test tips
Tips for class tests
- Write the jump between each pair of numbers above the pattern before you answer.
- If adding or subtracting does not work, try multiplying or dividing.
- Check your answer by using the rule on the number before it.
For parents and teachers
After this lesson, your child should be able to:
- describe and continue number patterns that add, subtract, multiply or divide;
- find missing numbers and mistakes in a pattern;
- make a pattern and state its rule.
Ask your child to say the rule in words (“start at 7 and add 7”). Patterns with fractions are covered later, in the fractions lessons.
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Previous: Rounding and Estimating – Standard 3 Maths
Next: Number Sentences with a Missing Number – Standard 3 Maths
Course: Standard 3 Maths
Updates
2026/11/04
– Added the link to the next lesson.
2026/11/03
– First version of this lesson.
Attributions to media used in this post:
Marelle (DSC 3214).jpg – Trougnouf (Benoit Brummer) – CC BY 4.0 (via Wikimedia Commons)
© 2026 Vedesh Kungebeharry. All rights reserved.





