Keystones — Lintel
Five GCSE retrieval questions · 7 July 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 88,000,000 in standard form
Answer: 8.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 26.11cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5kg : 750g
Answer: 20:3 -
5. Statistics Mean
Calculate the mean of: 35, 22, 26, 14, 18, 38, 49, 28
Answer: 28.75