Keystones — Lintel
Five GCSE retrieval questions · 30 August 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
68000
Answer: 6.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 49°. Find opposite
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Simplify: 20:8:8
Answer: 5:2:2 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 48, 24, 30, what is the missing number?
Answer: 30