There are 180 people in a cinema.
Half of the people in the cinema are adults.
The number of adults is five times the number of children.
The rest of the people in the cinema are teenagers.
the number of teenagers : the number of children = n:1 n : 1\,n:1
Work out the value of nnn.
You must show how you get your answer.
64 exam-style questions on Edexcel GCSE Maths Writing and Simplifying Ratio. Each one has a worked solution and a mark scheme showing where the marks go.