Keystones — Lintel
Five GCSE retrieval questions · 10 May 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
12000000
Answer: 1.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 50°. Find opposite
Answer: 33.4cm -
4. Ratio Mixed ratio problems
In ratio 1:3:4, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 47, 48, 50, 17, 39, 32
Answer: 38.8