Keystones — Lintel
Five GCSE retrieval questions · 25 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0078
Answer: 7.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 42°. Find adjacent side
Answer: 26cm -
4. Ratio Mixed ratio problems
£248.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £93.00 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 33, 29, 21, 45, what is the missing number?
Answer: 22