Keystones — Lintel
Five GCSE retrieval questions · 11 March 2025 · mathsvault.uk/keystones
-
1. Number Converting to standard form
36000
Answer: 3.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 40°. Find opposite
Answer: 16.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 30, 22, 19, 18, 26, what is the missing number?
Answer: 77