Keystones — Lintel
Five GCSE retrieval questions · 17 February 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 600,000,000 in standard form
Answer: 6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 28.88cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 50 ml
Answer: 40:1 -
5. Statistics Mean
Calculate the mean of: 24, 18, 12, 22, 30, 39. Give your answer to 2 decimal places
Answer: 24.17