Keystones — Lintel
Five GCSE retrieval questions · 12 March 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000063 in standard form
Answer: 6.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.96cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:10
Answer: 6:3:5 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 31, 38, 18, what is the missing number?
Answer: 53