Keystones — Lintel
Five GCSE retrieval questions · 6 August 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00033 in standard form
Answer: 3.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 12.14cm -
4. Ratio Mixed ratio problems
Simplify: 9:12:18
Answer: 3:4:6 -
5. Statistics Mean
Calculate the mean of: 8, 9, 24, 31, 50, 42, 9, 45
Answer: 27.25