## Exam-Style Question on Proportion## A mathematics exam-style question with a worked solution that can be revealed gradually |

Question id: 504. This question is similar to one that appeared on a GCSE Higher paper in 2019. The use of a calculator is not allowed.

If \(a\) is inversely proportional to \(b\) and \(b\) is directly proportional to \(c^2\) find a formula for \(a\) in terms of \(c\) given that \( a=20 \) and \(c = 4 \) when \(b = 8 \).

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If you need more practice try the self-checking interactive exercises called Direct and Inverse Proportion.

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