Keystones — Lintel
Five GCSE retrieval questions · 14 January 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0008 in standard form
Answer: 8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.66cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 2:4:1
Answer: 48, 96 and 24 -
5. Statistics Mean
Calculate the mean of: 14, 33, 11, 18, 35, 5. Give your answer to 2 decimal places
Answer: 19.33