Keystones — Lintel
Five GCSE retrieval questions · 12 August 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
1900000
Answer: 1.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 46°. Find opposite
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Simplify: 9:18:9
Answer: 1:2:1 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 23, 19, 22, what is the missing number?
Answer: 16