Keystones — Lintel
Five GCSE retrieval questions · 6 May 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 2,100,000 in standard form
Answer: 2.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 20x + 100
Answer: (x + 10)(x + 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.89cm -
4. Ratio Mixed ratio problems
Express the second part of 9:7 as a fraction in simplest form
Answer: 7⁄16 -
5. Statistics Mean
Calculate the mean of: 30, 43, 29, 28, 11, 22, 30. Give your answer to 2 decimal places
Answer: 27.57