Keystones — Lintel
Five GCSE retrieval questions · 5 November 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000069 in standard form
Answer: 6.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 7.27cm -
4. Ratio Mixed ratio problems
Red and blue marbles are in the ratio 12:5. What fraction of the marbles are red?
Answer: 12⁄17 -
5. Statistics Mean
Calculate the mean of: 37, 50, 27, 43, 42, 16, 6. Give your answer to 2 decimal places
Answer: 31.57