Keystones — Lintel
Five GCSE retrieval questions · 19 September 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00031
Answer: 3.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 64°. Find adjacent side
Answer: 17.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 50, 34, 45, 15, 38, 44, 36
Answer: 37.4