Keystones — Lintel
Five GCSE retrieval questions · 30 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0029 in standard form
Answer: 2.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 12
Answer: (x + 6)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.27cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:15
Answer: 4:2:5 -
5. Statistics Mean
Calculate the mean of: 43, 14, 7, 8, 31, 41, 37. Give your answer to 2 decimal places
Answer: 25.86