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11+ Maths · Data

Crack the Pictogram Key

A short worked example (2:34) for one 11+ maths skill: Decode a pictogram key.

This video shows how to use a pictogram’s key to calculate the quantity represented by its symbols. Watch an 11+ maths question solved step by step.

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A tiny picture can hide a surprisingly big number. One apple icon might mean one apple... or five! The secret is not in the row. It is tucked inside the key, and that key unlocks every symbol.

A pictogram uses repeated pictures to represent amounts. First, find the label you were asked about. Trace across that named row, so you do not accidentally count a different row. Then pause at the key. If one star represents four votes, each star is worth FOUR, not one. Now count only the complete symbols in that row. Suppose you see three stars. Match each star to a group of four: four, eight, twelve. That is three groups of four, so multiply three by four. The row represents twelve votes. Do not count the spaces or grid intervals. They help organise the chart, but they have no value. Decode the symbol using the key. If a half-symbol ever appears, use it only when the key clearly tells you what that fraction represents.

Let's work through an example. A pictogram shows how many books four children read during a holiday. The key says one book symbol represents three books. In Zara's row, there are six complete book symbols. How many books did Zara read? Start with the correct label: Zara. Slide across Zara's row and count the book symbols carefully. One, two, three, four, five, six. There are SIX symbols. But six is not the answer, because each symbol stands for three books. Now decode the key. Six symbols means six groups of three books. You can add three six times, or calculate six multiplied by three. Watch the groups combine... three, six, nine, twelve, fifteen, eighteen. Zara read eighteen books. Write the quantity and its unit: eighteen books.

Remember: find the named row, count its symbols, then multiply by the value in the key. The pictures are clues, not the final amount. Decode the key, include the unit, and you will crack every pictogram confidently!

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