Keystones — Lintel
Five GCSE retrieval questions · 7 July 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
400000
Answer: 4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 47°. Find opposite
Answer: 16.cm -
4. Ratio Mixed ratio problems
Simplify: 20:12:24
Answer: 5:3:6 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 23, 39, 25, 20, 34, what is the missing number?
Answer: 15