Keystones — Cornerstone
Five GCSE retrieval questions · 17 October 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 43 + ? = 123
Answer: 80 -
2. Algebra
For y = x³ + 7, calculate y when x = 3
Answer: y = 34 -
3. Geometry
Find the area of a right triangle with base 10cm and height 9cm
Answer: 45cm² -
4. Ratio
Simplify the ratio 12:16
Answer: 3:4 -
5. Statistics
A bag has 8 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 8⁄13