Keystones — Lintel
Five GCSE retrieval questions · 11 March 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000038 in standard form
Answer: 3.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 23.04cm -
4. Ratio Mixed ratio problems
£322.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
Calculate the mean of: 49, 8, 38, 42, 33, 36, 33, 15
Answer: 31.75