Keystones — Lintel
Five GCSE retrieval questions · 13 December 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
6500000
Answer: 6.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 56°. Find opposite
Answer: 32.6cm -
4. Ratio Mixed ratio problems
In ratio 3:2:3, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 32, 22, 41, what is the missing number?
Answer: -15