Keystones — Lintel
Five GCSE retrieval questions · 4 September 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 430,000,000 in standard form
Answer: 4.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 40
Answer: (x + 10)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.77cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:8
Answer: 3:3:2 -
5. Statistics Mean
Calculate the mean of: 41, 30, 20, 32, 21, 46, 35. Give your answer to 2 decimal places
Answer: 32.14