Keystones — Lintel
Five GCSE retrieval questions · 6 February 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000063 in standard form
Answer: 6.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 16.78cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 550g
Answer: 20:11 -
5. Statistics Mean
Calculate the mean of: 35, 30, 44, 33, 10, 36. Give your answer to 2 decimal places
Answer: 31.33