Keystones — Lintel
Five GCSE retrieval questions · 27 May 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 842 + 689
Answer: 842 + 689 = 1531 -
2. Algebra
Factorise fully: 12x² + 15x
Answer: 3x(4x + 5) -
3. Geometry
Find the distance between (1, -8) and (5, 7)
Answer: 15.52 -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
A bag has 4 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2