Keystones — Cornerstone
Five GCSE retrieval questions · 22 June 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 34 + ? = 162
Answer: 128 -
2. Algebra
Solve: 7x - 9 = 2x + 11
Answer: x = 4 -
3. Geometry
Opposite = 9cm, adjacent = 19cm. Calculate the angle
Answer: 25.3° -
4. Ratio
Simplify: 6:9:9
Answer: 2:3:3 -
5. Statistics
A bag has 8 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 2⁄3