Keystones — Cornerstone
Five GCSE retrieval questions · 7 December 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 45 + ? = 150
Answer: 105 -
2. Algebra
Expand: 4(3x + 5)
Answer: 12x + 20 -
3. Geometry
Opposite = 19cm, adjacent = 12cm. Calculate the angle
Answer: 57.7° -
4. Ratio
Find 57% of 110
Answer: 62.7 -
5. Statistics
A bag has 4 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 1⁄3