Keystones — Lintel
Five GCSE retrieval questions · 20 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.012
Answer: 1.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 58°. Find opposite
Answer: 20.8cm -
4. Ratio Mixed ratio problems
£210.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
Calculate the mean of: 30, 32, 18, 25, 41, 7, 20, 50
Answer: 27.9