Keystones — Cornerstone
Five GCSE retrieval questions · 9 June 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 30 + ? = 101
Answer: 71 -
2. Algebra
Expand: 6(5x + 2)
Answer: 30x + 12 -
3. Geometry
Opposite = 15cm, hypotenuse = 30cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Calculate 25% of 131
Answer: 32.75 -
5. Statistics
A bag has 6 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2