Keystones — Lintel
Five GCSE retrieval questions · 23 September 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 58 + ? = 142
Answer: 84 -
2. Algebra
Solve: x⁄2 = 14.5
Answer: x = 29 -
3. Geometry
Opposite = 8cm, adjacent = 12cm. Calculate the angle
Answer: 33.7° -
4. Ratio
Simplify: 9:15:15
Answer: 3:5:5 -
5. Statistics
A bag has 7 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 7⁄10