What this practice covers
These questions are drawn from past CIE 9708 papers and filtered to price elasticity of supply. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
Start practising Paper 1 MCQs →
What examiners see students get wrong here
These are the errors that cost marks on price elasticity of supply, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- PES is negative. Usually wrong. PES is normally positive because price and quantity supplied move in the same direction.
- PES measures a shift of supply. Wrong. PES measures responsiveness along a supply curve.
- A steep curve automatically proves inelasticity in every case. Too simplistic. Elasticity is about proportionate responsiveness.
- Longer time always makes PES perfectly elastic. Wrong. It usually becomes more elastic, not necessarily perfectly elastic.
- No spare capacity means no production can increase at all. Wrong. It becomes harder, not necessarily impossible.
- Primary products always have perfectly inelastic supply. Wrong. They are often relatively inelastic in the short run, not perfectly inelastic in all cases.
- Storage always makes supply elastic. Not always. It can help, but other constraints may still matter.
- Elasticity and slope are exactly the same. Wrong. Related in simple diagrams, but not identical concepts.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Price Elasticity of Supply revision notes.