Keystones — Cornerstone
Five GCSE retrieval questions · 8 October 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 67 + ? = 105
Answer: 38 -
2. Algebra
Solve: x + 14 = 24
Answer: x = 10 -
3. Geometry
Opposite = 15cm, hypotenuse = 30cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Find 72% of 198
Answer: 142.56 -
5. Statistics
A bag has 3 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3