Keystones — Lintel
Five GCSE retrieval questions · 12 March 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 660,000 in standard form
Answer: 6.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 250 ml
Answer: 16:1 -
5. Statistics Mean
Calculate the mean of: 5, 20, 24, 28, 9, 29. Give your answer to 2 decimal places
Answer: 19.17