Keystones — Lintel
Five GCSE retrieval questions · 3 August 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 250,000 in standard form
Answer: 2.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 6.35cm -
4. Ratio Mixed ratio problems
Orange, purple and pink beads are in the ratio 7:5:4. What fraction of the beads are orange?
Answer: 7⁄16 -
5. Statistics Mean
Calculate the mean of: 37, 34, 13, 40, 10, 15, 40
Answer: 27