Keystones — Lintel
Five GCSE retrieval questions · 23 July 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 66,000 in standard form
Answer: 6.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.93cm -
4. Ratio Mixed ratio problems
Express the first part of 15:10 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 33, 19, 41, 29, 33, 16, 47, 50
Answer: 33.5