Keystones — Lintel
Five GCSE retrieval questions · 16 August 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00088 in standard form
Answer: 8.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 6.61cm -
4. Ratio Mixed ratio problems
Red, blue and green marbles are in the ratio 8:9:12. What fraction of the marbles are green?
Answer: 12⁄29 -
5. Statistics Mean
Calculate the mean of: 34, 23, 13, 43, 40, 32, 49, 15. Give your answer to 2 decimal places
Answer: 31.13