Keystones — Lintel
Five GCSE retrieval questions · 21 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 41°. Find adjacent side
Answer: 14.3cm -
4. Ratio Mixed ratio problems
£320.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 38, 47, 42, 20, 48, what is the missing number?
Answer: -63