Keystones — Lintel
Five GCSE retrieval questions · 3 January 2023 · mathsvault.uk/keystones
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1. Number
0.0036
Answer: 3.6 × 10^-3 -
2. Algebra
Factorise: 6x² + 8x
Answer: 2x(3x + 4) -
3. Geometry
Calculate the hypotenuse when a = 7cm and b = 8cm
Answer: 10.63cm -
4. Ratio
Simplify: 12:9:18
Answer: 4:3:6 -
5. Statistics
A bag has 8 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 2⁄3