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Tamil Nadu (TNBSE)Class 1 Mathematics★ 2-4 marks in TN Class 1 Term 3 exam — sorting objects by attribute and reading simple pictographs

Information Processing

Samacheer Kalvi (TN State Board) Class 1 Mathematics — Chapter 7, Information Processing. Sorting and reading pictographs. 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…

1Sort objects into groups based on ONE attribute — colour, size, shape, or type
2Read a simple pictograph where one picture = one item (e.g., 😊 = 1 child)
3Count the total from a pictograph — how many of each category
4Compare two categories in a pictograph — which has more? Which has less? How many more?
5Explain why sorting helps us organise and understand information better

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Why this chapter matters

Information Processing is the earliest form of data science. Children learn to sort things into groups — red toys in one pile, blue in another — and then read a pictograph (a picture graph) that shows 'how many' at a glance. This is the exact skill that later becomes charts, graphs, and data analysis. In a world full of information, sorting and organising is a superpower.

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Information Processing — Class 1 Mathematics (Samacheer Kalvi)

TN State Board (Samacheer Kalvi) Class 1 Mathematics, Chapter 7. Sorting and reading pictographs.

1. About this chapter

This chapter covers Information Processing as part of the Class 1 Samacheer Kalvi Mathematics curriculum. It deals with sorting and reading pictographs and builds conceptual understanding essential for the TN School Term Exam.

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

Sort objects by one attribute
Read simple pictographs

2. Key concepts

Concept 1: Sort objects by one attribute.
Concept 2: Read simple pictographs.

3. Important terms and formulas

Term / Formula	Description
Sort objects by one…	Sort objects by one attribute
Read simple pictographs…	Read simple pictographs

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 information processing.

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 7.
Give two real-life examples related to information processing.
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 7: Information Processing.
Core idea: Sorting and reading pictographs.
Key outcomes: Sort objects by one attribute; Read simple pictographs.
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.

Sorting — putting things into groups

Sorting means grouping things that are the SAME in some way. You can sort by: Colour (all red together, all blue together), Size (big vs small), Shape (circles in one pile, squares in another), Type (fruits vs vegetables, animals vs birds).

Example: A mixed box of buttons can be sorted by colour — all red buttons in one group, all blue in another. Sorting makes it easy to count 'how many of each.'

Reading a pictograph (picture graph)

A pictograph uses pictures to show information. 1 picture = 1 item. Look at the title to know what it shows. Count the pictures in each row. The row with MORE pictures has MORE of that thing.

Example: A pictograph of 'Fruits children like': 🍎🍎🍎🍎 = 4 like Apple. 🍌🍌🍌 = 3 like Banana. 🍇🍇🍇🍇🍇 = 5 like Grapes. Grapes is the most liked!

Making comparisons from a pictograph

Which is MORE? → The row with more pictures. Which is LESS? → The row with fewer pictures. HOW MANY MORE? → Subtract: bigger count − smaller count.

Example: 5 children like grapes and 3 like banana. How many MORE like grapes? 5 − 3 = 2 more children like grapes than banana.

Real-life sorting examples

At home: sorting vegetables after buying from the market. In school: arranging books by subject. In play: grouping toys by type — all cars together, all blocks together.

Sorting is something we do naturally. This chapter gives children the mathematical vocabulary to talk about it.

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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

✗ Sorting by two attributes at once — putting 'big red buttons' separate from 'small red buttons' when only asked to sort by colour

✓ In Class 1, sort by only ONE thing at a time. If asked to sort by colour, all red go together regardless of size or shape.

WATCH OUT

✗ Counting pictures in a pictograph carelessly — missing one or counting one twice

✓ Point at each picture with a pencil as you count. Count row by row. Write the number next to each row.

WATCH OUT

✗ Forgetting to check what 1 picture stands for — assuming it's always 1 item

✓ In Class 1, 1 picture = 1 item. But always read the key (scale) if there is one. E.g., '😊 = 1 student'.

WATCH OUT

✗ Saying 'Apple has 4' without looking at the pictograph key — the title might say 'Fruits my friends like' not 'Fruits I have'

✓ Always read the TITLE of the pictograph first. The title tells you what the numbers mean.

Practice problems

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

Q1EASY· Sort

Sort these by colour: 🔴🔵🔴🔵🔴. How many red? How many blue?

▶ Show solution

Red: 3 (🔴🔴🔴). Blue: 2 (🔵🔵).

Q2EASY· Pictograph read

Pictograph of 'Pets': 🐕🐕🐕🐕🐕 (5 dogs), 🐈🐈🐈 (3 cats). How many dogs?

▶ Show solution

5 dogs

Q3MEDIUM· Pictograph compare

Pictograph of 'Ice cream flavours': 🍫🍫🍫🍫 (4 chocolate), 🍓🍓 (2 strawberry), 🥭🥭🥭 (3 mango). Which flavour is most liked? Which is least?

▶ Show solution

Most liked: Chocolate (4). Least liked: Strawberry (2).

Q4MEDIUM· How many more

Pictograph: Students who walk to school 🚶🚶🚶🚶🚶 (5). Students who come by bus 🚌🚌🚌 (3). How many more walk than come by bus?

▶ Show solution

5 − 3 = 2 more students walk.

Q5HARD· Create

Ask 5 classmates: 'Do you like dosa or idli more?' Draw a pictograph using 😊 for dosa and 😋 for idli. Write which is liked more.

▶ Show solution

The student draws a pictograph with correct counts. Answer depends on their actual survey. Example: 😊😊😊 (3 dosa), 😋😋 (2 idli) → Dosa is liked more.

5-minute revision

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

•Sorting = grouping things that are the SAME by one attribute (colour, size, shape, type).
•In Class 1, sort by only ONE attribute at a time.
•A pictograph uses pictures to show information. 1 picture = 1 item.
•Always read the TITLE of the pictograph first.
•To compare: count pictures in each row. More pictures = more items.
•How many more? Subtract: bigger count − smaller count.
•Sorting and pictographs are the first steps towards data handling and statistics.

Tamil Nadu (TNBSE) marks blueprint

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

Typical chapter weightage: 2-4 marks in TN Class 1 Term 3 Mathematics exam

Question type	Marks each	Typical count	What it tests
Sorting	1	1	Group objects by colour, size, or shape — count each group
Pictograph reading	1-2	1-2	Reading counts from a pictograph, comparing categories
How many more/less	1	1	Subtraction from pictograph data

Prep strategy

Practise sorting objects at home: sort dal/chawal mixed together, sort coloured beads, sort toy animals from toy vehicles
Read pictographs in newspapers or magazines — even simple ones in children's sections
Create simple pictographs: survey family members about favourite food, tv show, etc.
Always count carefully — use finger pointing for each picture in the pictograph

Where this shows up in the real world

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

Sorting in daily life

From arranging a school bag to organising a kitchen shelf, sorting is everywhere. Tamil households sort groceries (arisi, paruppu, milagai) into separate containers — that's information processing in action.

Pictographs in media

Newspapers and TV news use pictographs to show election results, cricket scores, and weather data. The pictograph skills learned in Class 1 are the foundation for understanding these visual representations later.

Early coding and logic

Sorting by attributes and reading data are essential thinking skills for computer programming. When children learn to group and count systematically, they are building the logical mindset that coding requires.

Exam strategy

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

Sorting: Look at the attribute mentioned (colour? size? shape?). Group everything matching that attribute together.
Pictograph: Read the title first. Then count each row with a pencil tip. Write the count next to the row.
Comparison: 'Which is more?' — the one with more pictures. 'How many more?' — subtract.
Trick: Sometimes a pictograph row may be empty (0). That is also an answer — 'No one likes it' or 'Zero'.

Going beyond the textbook

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

Sort objects by two attributes: 'Find all BIG RED shapes.'
Interpret a pictograph where 1 picture = 2 items (scale).
Given data as numbers, draw your own pictograph choosing an appropriate symbol.
Tally marks introduction — another way to record counts before drawing a pictograph.

Where else this chapter is tested

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

TN School Term 3 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.

Sorting is putting things into groups based on how they are the same. It helps us organise things so we can find and count them easily. A sorted pile of crayons makes it easy to find the red one.

A pictograph (or picture graph) is a way to show information using pictures. Each picture stands for one item. It makes comparing 'how many' easy and fun — just look at which row has more pictures!

Count the pictures in each row. The row with the bigger number has more. If the rows have the same number of pictures, they are equal.

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