Comparing Sets of Data for 11+ Maths: A Parent's Guide
19 October 2026
What does comparing sets of data mean
In the 11+ Maths exam, children are often asked to look at two or more sets of data and compare them. This might involve reading bar charts, tables, pictograms, or pie charts, then deciding which group has more, less, or is the same. Sometimes, children need to spot trends or differences between two classes, years, or categories.
Why this skill matters
Comparing data is about more than just reading numbers. It helps children develop logical thinking, spot patterns, and draw conclusions. These skills are vital for the 11+ and for later maths topics. Data comparison questions can be straightforward, but they sometimes require careful attention to the way information is presented.
Common types of questions
Children may be asked to compare totals, find the difference between two categories, or identify which set has the highest or lowest value. Some questions ask for averages, such as the mean or median, or for children to comment on how data is spread out (the range). It's also common to see two charts side by side, which need to be read together.
Key insight: Look beyond the numbers
Encourage your child to think about what the data shows in context. For example, if one class has a higher average score but a wider range, it means results are more spread out. Remind them to check the scales on graphs and to read any labels carefully, as these can change the meaning of the data.
How to practise at home
Use everyday examples, such as comparing family members' heights, weekly temperatures, or the number of books read in different months. Create simple bar charts or tables together and ask questions like: Who read the most? What's the difference between the highest and lowest? Which month was the busiest?
Supporting your child with 11+ style questions
Work through practice worksheets that include a variety of data types. Bar charts, tables, pictograms, and pie charts. Focus on questions that ask for comparisons, not just data reading. Encourage your child to explain their reasoning out loud, as talking through their thinking helps deepen understanding.
