Keystones — Lintel
Five GCSE retrieval questions · 20 October 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 43,000 in standard form
Answer: 4.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 16.94cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 100 ml
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 19, 21, 45, 50, 21, 29, 29, 22
Answer: 29.5