Keystones — Lintel
Five GCSE retrieval questions · 10 March 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00098 in standard form
Answer: 9.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.49cm -
4. Ratio Mixed ratio problems
Express the second part of 4:5 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
Calculate the mean of: 17, 7, 6, 22, 49, 26, 30, 34. Give your answer to 2 decimal places
Answer: 23.88