Keystones — Lintel
Five GCSE retrieval questions · 24 July 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
20000000
Answer: 2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 47°. Find opposite
Answer: 17.2cm -
4. Ratio Mixed ratio problems
£343.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £196.00 -
5. Statistics Mean
Calculate the mean of: 33, 14, 13, 42, 39, 41, 28
Answer: 30