Keystones — Lintel
Five GCSE retrieval questions · 4 February 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 8,600,000 in standard form
Answer: 8.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.96cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 15:8. What fraction of the beads are blue?
Answer: 8⁄23 -
5. Statistics Mean
Calculate the mean of: 16, 19, 28, 8, 24, 42, 47. Give your answer to 2 decimal places
Answer: 26.29