Keystones — Lintel
Five GCSE retrieval questions · 12 October 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
400000
Answer: 4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 49°. Find adjacent side
Answer: 15.cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 1:2:1
Answer: 30, 60 and 30 -
5. Statistics Mean
Calculate the mean of: 15, 50, 9, 37, 33, 28, 46
Answer: 31.1