Chapter 15, Data Through Pictures, is about reading and interpreting pictographs (where one picture stands for a fixed number of items) and bar charts (where bar height stands for quantity). These questions practise both.
Practice Questions
Q1. In a pictograph, one picture of an apple represents 5 apples sold. If a row shows 4 apple pictures, how many apples were sold?
4 × 5 = 20 apples.
Q2. A bar chart shows the bar for Tuesday reaching 30 and the bar for Wednesday reaching 45. Which day had more, and by how much?
Wednesday had more, by 45 − 30 = 15.
Q3. A pictograph’s key says 1 flower symbol = 10 votes. A candidate’s row shows 6 flower symbols. How many votes did the candidate get?
6 × 10 = 60 votes.
Q4. In a bar chart of items sold at a shop, “Notebooks” has the tallest bar and “Erasers” has the shortest. What can we conclude?
Notebooks were bought most often, and Erasers were bought least often, among the items shown.
Q5. Why might a pictograph show a “half picture” symbol sometimes?
To represent an amount that falls exactly halfway between two multiples of the key value — for example, if 1 symbol = 10 units, half a symbol shows 5 units.
Why These Help
Pictographs and bar charts turn a list of numbers into a picture that can be compared at a glance, which is exactly how newspapers, school reports and weather updates present data in everyday life.
Frequently Asked Questions
Q. What is the main advantage of a pictograph or bar chart over a plain list of numbers?
Pictures and bar heights let readers instantly compare quantities and spot the largest, smallest, and overall pattern, without carefully reading every individual number.
See the Chapter 15 Solutions and Revision Notes for the full walkthrough.
