Keystones — Lintel
Five GCSE retrieval questions · 15 November 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 9,100,000 in standard form
Answer: 9.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.75cm -
4. Ratio Mixed ratio problems
Orange, purple and pink beads are in the ratio 7:8:2. What fraction of the beads are pink?
Answer: 2⁄17 -
5. Statistics Mean
Calculate the mean of: 40, 48, 26, 14, 37, 22, 33. Give your answer to 2 decimal places
Answer: 31.43