Keystones — Lintel
Five GCSE retrieval questions · 7 February 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.002 in standard form
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.26cm -
4. Ratio Mixed ratio problems
Divide 91 in the ratio 3:1:3
Answer: 39, 13 and 39 -
5. Statistics Mean
Calculate the mean of: 48, 11, 47, 9, 35, 41, 16, 28. Give your answer to 2 decimal places
Answer: 29.38