Keystones — Lintel
Five GCSE retrieval questions · 16 March 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 70,000 in standard form
Answer: 7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 120
Answer: (x + 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 31.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m : 60cm
Answer: 40:3 -
5. Statistics Mean
Calculate the mean of: 39, 40, 36, 5, 42, 43. Give your answer to 2 decimal places
Answer: 34.17