Keystones — Lintel
Five GCSE retrieval questions · 24 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0013
Answer: 1.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 34°. Find adjacent side
Answer: 16.6cm -
4. Ratio Mixed ratio problems
£132.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 17, 46, 27, 33, what is the missing number?
Answer: 77