Keystones — Lintel
Five GCSE retrieval questions · 23 March 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
57000000
Answer: 5.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 56°. Find opposite
Answer: 16.3cm -
4. Ratio Mixed ratio problems
Simplify: 24:8:16
Answer: 3:1:2 -
5. Statistics Mean
The mean of 5 numbers is 24. If 4 of them are 30, 25, 34, 26, what is the missing number?
Answer: 5