Keystones — Lintel
Five GCSE retrieval questions · 1 August 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 790,000 in standard form
Answer: 7.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.92cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 1:3:4
Answer: 27, 81 and 108 -
5. Statistics Mean
Calculate the mean of: 10, 40, 35, 31, 23, 35, 50, 21. Give your answer to 2 decimal places
Answer: 30.63