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Tamil Nadu (TNBSE)Class 1 Mathematics★ 3-4 marks in TN Class 1 Term 1 exam — pattern completion, what-comes-next, and creating simple patterns

Patterns

Samacheer Kalvi (TN State Board) Class 1 Mathematics — Chapter 3, Patterns. Recognising and creating repeating patterns. Study notes, key concepts, worked examples, practice questions and quick revision for exam preparation.

⏱ 10 min readEasy difficulty✓ Free · NCERT-aligned

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By the end of this chapter you'll be able to…

1Identify a repeating pattern in shapes, colours, numbers, and sounds
2Extend a given pattern — look at the rule and say/draw what comes next
3Identify the core (repeating unit) of a pattern — e.g., in '○□○□○□', the core is '○□'
4Create own simple patterns using colours, shapes, or body movements
5Find patterns in everyday life — tiles, kolam/rangoli, clothing, music beats

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Why this chapter matters

Patterns are everywhere — the tiles on the floor, the stripes on a tiger, the beats of a song, even the rhythm of day and night. This chapter trains a child's brain to notice order in the world, predict what comes next, and think logically. Pattern recognition is the foundation of coding, music, art, and mathematical thinking — and it all starts here with simple shapes and colours.

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Patterns — Class 1 Mathematics (Samacheer Kalvi)

TN State Board (Samacheer Kalvi) Class 1 Mathematics, Chapter 3. Recognising and creating repeating patterns.

1. About this chapter

This chapter covers Patterns as part of the Class 1 Samacheer Kalvi Mathematics curriculum. It deals with recognising and creating repeating patterns and builds conceptual understanding essential for the TN School Term Exam.

By the end of this chapter, students will be able to:

Identify and extend repeating patterns
Create simple colour and shape sequences

2. Key concepts

Concept 1: Identify and extend repeating patterns.
Concept 2: Create simple colour and shape sequences.

3. Important terms and formulas

Term / Formula	Description
Identify and extend repeating…	Identify and extend repeating patterns
Create simple colour and…	Create simple colour and shape sequences

4. Worked examples

Example 1. Applying a key concept from this chapter.

Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.

Example 2. A typical exam-style question on patterns.

Solution: Break the problem into steps, use the appropriate formula and verify the answer.

5. Common mistakes

Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.

6. Practice (exam-style)

Define the main term or principle covered in Chapter 3.
Give two real-life examples related to patterns.
Solve a short numerical or descriptive question from this chapter.
State one important formula and explain each symbol.

7. Answer key (hints)

Refer to section 2 (Key concepts) above for the definition.
Examples should be drawn from daily experience and local context.
Apply the formula from section 3, show all steps clearly.
Formula with units — refer to the textbook glossary for symbol meanings.

8. Quick revision

Class 1 Mathematics — Chapter 3: Patterns.
Core idea: Recognising and creating repeating patterns.
Key outcomes: Identify and extend repeating patterns; Create simple colour and shape sequences.
Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.

Key formulas & results

Everything you need to memorise, in one card. Screenshot this for revision.

What is a pattern?

A pattern is something that repeats again and again in the SAME order. Pattern = a rule that repeats.

Example: 🟡🔴🟡🔴🟡🔴 — The rule is 'yellow, red, yellow, red'. The pattern repeats every 2 items. If something breaks the rule, it is not a pattern.

Types of patterns in Class 1

Shape pattern: ○ △ ○ △ ○ △ ... Colour pattern: 🔵🔴🔵🔴🔵🔴 ... Number pattern: 1 2 1 2 1 2 ... Size pattern: big small big small ... Sound pattern: clap tap clap tap ... Movement pattern: hop skip hop skip ...

The 'core' is the smallest part that repeats. In ○ □ ○ □, the core is '○ □'. In 🔴🔵🟢 🔴🔵🟢, the core is '🔴🔵🟢' (3 items).

Finding what comes next

Step 1: Look at the first few items. Step 2: Find the rule (what repeats?). Step 3: Apply the rule to predict the next item.

Example: △ ○ △ ○ △ ___? Rule: triangle, circle repeats. Next is ○. Example with 3 items: 🔴🔵🟢🔴🔵🟢🔴 ___? Rule: red, blue, green. Next is 🔵.

Patterns in Tamil culture — Kolam/Rangoli

Kolam (கோலம்) is a traditional Tamil floor art drawn with rice flour. It uses repeating patterns of dots, curves, and lines.

Kolam is a beautiful example of mathematical patterns in everyday Tamil life. The dot grid (pulli) forms the base, and patterns are drawn around it symmetrically.

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Common mistakes & fixes

These are the exact errors that cost students marks in board exams. Read them once, save yourself the trouble.

WATCH OUT

✗ Guessing 'what comes next' without first finding the repeating rule

✓ Always look at the first few items carefully. Say the sequence aloud: 'circle, square, circle, square...' Then it becomes clear that 'circle' comes next.

WATCH OUT

✗ Thinking any sequence is a pattern — 'cat, dog, elephant' is not a pattern unless it repeats

✓ A pattern MUST repeat. If it doesn't go 'cat, dog, cat, dog' and instead is just a list 'cat, dog, elephant', it is NOT a pattern. There is no repeating rule.

WATCH OUT

✗ Missing the larger core in a 3-item pattern like 🔴🔵🟢🔴🔵🟢 and thinking the next item is 🔴 (when asked for the 5th item)

✓ Count carefully. If the core is 3 items (🔴🔵🟢), then: item 1 = 🔴, 2 = 🔵, 3 = 🟢, 4 = 🔴, 5 = 🔵, 6 = 🟢, etc.

Practice problems

Try each one yourself before tapping "Show solution". Active recall > rereading.

Q1EASY· Extend

○ ● ○ ● ○ ___ — What comes next?

▶ Show solution

● (the pattern is circle, filled circle repeating)

Q2EASY· Number pattern

1, 2, 1, 2, 1, ___ — What is the next number?

▶ Show solution

2 (the pattern is 1, 2 repeating)

Q3MEDIUM· Extend

🔴🔵🟢 🔴🔵🟢 🔴 ___ ___ — What are the next two?

▶ Show solution

🔵 and 🟢 (the core is red, blue, green = 3 items)

Q4MEDIUM· Identify core

In the pattern ■ ■ ▲ ■ ■ ▲ ■ ■ ▲, what is the repeating unit (core)?

▶ Show solution

■ ■ ▲ (the core is 3 items: square, square, triangle)

Q5HARD· Apply

Ravi draws this pattern: △ ○ △ △ ○ △ △ △ ○. What comes next in Ravi's pattern?

▶ Show solution

△ (the pattern is: number of triangles increases by one each time — 1 triangle, circle, 2 triangles, circle, 3 triangles, circle, then the next triangle starts the next group of 4)

5-minute revision

The whole chapter, distilled. Read this the night before the exam.

•A pattern is something that repeats again and again in the same order.
•The 'core' is the smallest repeating part (e.g., core of ○□○□ is '○□').
•Types: shape patterns, colour patterns, number patterns, sound patterns, movement patterns.
•To find what comes next: 1) Find the rule, 2) Apply the rule.
•Kolam is a traditional Tamil art form based on mathematical patterns.
•Not every list is a pattern — it must have a repeating rule.

Tamil Nadu (TNBSE) marks blueprint

Where the marks come from in this chapter — so you can plan your prep.

Typical chapter weightage: 3-4 marks in TN Class 1 Term 1 Mathematics exam

Question type	Marks each	Typical count	What it tests
What comes next?	1 each	2-3	Extending shape, colour, or number patterns
Identify the core / Draw pattern	1-2	1	Finding the repeating unit or creating own pattern

Prep strategy

Practise with real objects — arrange bangles, leaves, stones in patterns
Say the pattern aloud: verbalising the rule helps the brain recognise it
Draw patterns with colours: red-blue-red-blue or green-yellow-orange repeating
Look for patterns at home: kolam designs, floor tiles, bed sheet prints, saree borders

Where this shows up in the real world

This chapter isn't just an exam topic — it lives in the world around you.

Kolam and traditional art

Tamil women draw kolam (கோலம்) every morning outside their homes. The dot grid and the patterns drawn around them are real-world mathematics — symmetry, repetition, and spatial reasoning practised daily.

Music and rhythm

Every song has a repeating beat — a pattern of sounds. When children clap along to a rhythm, they are practising pattern recognition. Carnatic music talams are built on repeating rhythmic cycles.

Nature's patterns

Stripes on a tiger, spots on a butterfly, petals arranged in a flower — nature is full of patterns. This chapter helps children notice and appreciate them.

Exam strategy

Battle-tested tips from teachers and toppers for this chapter.

Say the pattern aloud softly: 'circle, square, circle, square...' — your ears will catch the rule.
For patterns with more than 2 items, count the core length: 'red, blue, green = 3 items, so the 4th is red again.'
Drawing: trace the shape neatly. Don't rush — a messy drawing can make your answer look wrong.
If you create your own pattern, make it clear: write the rule below like 'My rule: pink, purple, pink, purple.'

Going beyond the textbook

For olympiad aspirants and curious learners — topics that build on this chapter.

Growing patterns: 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, ___ (what comes next?)
Number patterns with a rule: 2, 4, 6, 8, ___ (add 2 each time — even numbers).
Pattern puzzles: What is the 10th item in ○△○△○△...? (The 10th is △ because even positions are triangles.)

Where else this chapter is tested

CBSE board isn't the only one — other exams test this chapter too.

TN School Term 1 ExamHigh

School Unit TestsHigh

Maths Olympiad (IMO Class 1)Medium

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Questions students ask

The real ones — pulled from the Q&A community and tutor sessions.

A pattern REPEATS. 'Cat, dog, cat, dog' is a pattern because it repeats. 'Cat, dog, elephant' is just a list — it does not repeat.

Look at the first few items. Find what repeats (the rule). Then apply that rule to know what comes next. Say the sequence aloud to help your brain find the rule.

Yes! A pattern's core can have any number of items. 'Red, blue, green, red, blue, green' has a 3-item core. 'Clap, tap, snap, clap, tap, snap' is also a 3-item sound pattern.

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