Keystones — Lintel
Five GCSE retrieval questions · 31 May 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
650000
Answer: 6.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 32°. Find opposite
Answer: 8.7cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:6
Answer: 2:1:1 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 33, 25, 46, 31, 29, what is the missing number?
Answer: 46