Keystones — Lintel
Five GCSE retrieval questions · 30 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00018
Answer: 1.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 26°. Find adjacent side
Answer: 31.5cm -
4. Ratio Mixed ratio problems
£336.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £126.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 32, 40, 39, 31, what is the missing number?
Answer: 28