Keystones — Lintel
Five GCSE retrieval questions · 9 February 2019 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.044
Answer: 4.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 54°. Find opposite
Answer: 41.3cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:6
Answer: 3:2:3 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 36, 31, 37, 37, what is the missing number?
Answer: 29