Keystones — Lintel
Five GCSE retrieval questions · 18 July 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00019 in standard form
Answer: 1.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 21.09cm -
4. Ratio Mixed ratio problems
Simplify: 16:8:8
Answer: 2:1:1 -
5. Statistics Mean
Calculate the mean of: 26, 5, 16, 28, 34, 45, 45. Give your answer to 2 decimal places
Answer: 28.43