Keystones — Lintel
Five GCSE retrieval questions · 5 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0028 in standard form
Answer: 2.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 3
Answer: (x + 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 15.59cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 100 ml
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 19, 37, 44, 34, 5, 14
Answer: 25.5