Keystones — Lintel
Five GCSE retrieval questions · 19 April 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 73,000 in standard form
Answer: 7.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.19cm -
4. Ratio Mixed ratio problems
Orange and purple beads are in the ratio 4:12. What fraction of the beads are orange?
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 19, 18, 10, 14, 28, 47, 30, 12
Answer: 22.25