Keystones — Lintel
Five GCSE retrieval questions · 17 September 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 85,000 in standard form
Answer: 8.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 80
Answer: (x + 10)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 14.95cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6kg : 350g
Answer: 120:7 -
5. Statistics Mean
Calculate the mean of: 39, 28, 45, 31, 27, 27. Give your answer to 2 decimal places
Answer: 32.83