Keystones — Lintel
Five GCSE retrieval questions · 28 August 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0063 in standard form
Answer: 6.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 40
Answer: (x + 5)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 60°. Find adjacent side
Answer: 15cm -
4. Ratio Mixed ratio problems
Divide 100 in the ratio 2:1:2
Answer: 40, 20 and 40 -
5. Statistics Mean
Calculate the mean of: 31, 46, 32, 29, 39, 9
Answer: 31