Class 6 Maths Chapter 4 Data Handling and Presentation Revision Notes

Turning raw, unorganised data into something readable is what Chapter 4 is all about, starting with tally marks and building up to pictographs and frequency tables.

Last Updated: September 23, 2026

Key Terms

• Data: a collection of information/observations.
• Raw data: data before it is organised.
• Tally marks: strokes used to count, grouped in bundles of 5 (four straight + one diagonal).
• Frequency: how many times a value occurs.
• Frequency distribution table: a table listing values with their frequencies.

Pictographs

• Represent data using symbols/pictures.
• A key/scale shows what quantity one symbol represents.
• Partial symbols can represent fractional quantities (e.g., half a symbol).

Bar Graphs

• Use bars of equal width with equal gaps between them.
• Bar height/length is proportional to the value, read against a scale.
• Vertical bars suit height-like data; horizontal bars suit length-like data.

Worked Answers Recap

• Traffic count total (150+1200+1000+800+700+600) = 4,450.
• Bumrah’s total wickets across 30 matches = 90.
• Railway ticket scale: 1 unit = 4 tickets.
• Sapling week total = 312; greatest day = Friday (60), least = Wednesday (30).
• Mudhol dogs: villages B+D (84) > other four combined (72).

Quick revision: Solutions | Extra Questions for this chapter.

Frequently Asked Questions

Why is it useful to organise raw data into a table or chart?
Organising raw data into a table or chart makes it much easier to identify patterns, compare values, and draw conclusions quickly, rather than interpreting the same information from a long, unorganised list.

What is the difference between a bar graph and a pictograph for presenting data?
A bar graph represents data using bars of varying heights or lengths proportional to their values, while a pictograph represents data using repeated small pictures or symbols, each standing for a fixed quantity.

Written by Satish

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