Keystones — Lintel
Five GCSE retrieval questions · 27 June 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 400,000 in standard form
Answer: 4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.01cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 800g
Answer: 5:2 -
5. Statistics Mean
Calculate the mean of: 14, 40, 33, 11, 21, 11. Give your answer to 2 decimal places
Answer: 21.67