Keystones — Lintel
Five GCSE retrieval questions · 7 August 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 440,000 in standard form
Answer: 4.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x - 11
Answer: (x + 11)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 60°. Find adjacent side
Answer: 17.5cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:6
Answer: 2:2:1 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 46, 44, 46, what is the missing number?
Answer: 16