Keystones — Lintel
Five GCSE retrieval questions · 28 September 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 85 + ? = 131
Answer: 46 -
2. Algebra
Factorise fully: 9x² + 15x
Answer: 3x(3x + 5) -
3. Geometry
Find c if a = 20cm and b = 25cm in a right triangle
Answer: 32cm -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
Find the range of: -19, 20, 7, -23, -17
Answer: 43