Keystones — Cornerstone
Five GCSE retrieval questions · 15 May 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 429 + 256
Answer: 429 + 256 = 685 -
2. Algebra
Solve: x + 12 = 19
Answer: x = 7 -
3. Geometry
Opposite = 9cm, hypotenuse = 18cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify the ratio 10:14
Answer: 5:7 -
5. Statistics
A bag has 3 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3