Keystones — Lintel
Five GCSE retrieval questions · 24 December 2024 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄2 + 2⁄3 + 1⁄5
Answer: 41⁄30 -
2. Algebra
Factorise fully: 20x² + 12x
Answer: 4x(5x + 3) -
3. Geometry
Opposite = 19cm, adjacent = 18cm. Calculate the angle
Answer: 46.5° -
4. Ratio
Simplify: 15:18:12
Answer: 5:6:4 -
5. Statistics
A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 6⁄11