Keystones — Lintel
Five GCSE retrieval questions · 13 December 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
91000000
Answer: 9.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 29°. Find adjacent side
Answer: 13.cm -
4. Ratio Mixed ratio problems
Simplify: 4:8:6
Answer: 2:4:3 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 28, 36, 43, 23, what is the missing number?
Answer: -20