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Population Pyramids

✏️ Paper first! Work out every question on paper before you open the answer. Write down every step – the equation, the numbers with units, the rearranging and the answer with its unit. In the exam, if your final answer is wrong you can still get marks for correct working, but only if the examiner can see it.

Read population pyramids: the percentage in an age group, the young and elderly populations, the dependency ratio and the stage of the demographic transition model. A new country shape every time.

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Worked solution

Each bar shows the percentage of the whole population that is male (left) or female (right) in that age group. All the bars add up to 100%. Dependency ratio = (aged 0–14 + aged 65+) ÷ aged 15–64 × 100. It gives the number of dependants for every 100 people of working age.

Pyramids are realistic made-up examples. Readings from the graph are marked correct if they are close. Answers worked out from a table must be correct to 1 decimal place.

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