Keystones — Lintel
Five GCSE retrieval questions · 19 March 2025 · mathsvault.uk/keystones
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1. Number
Calculate: (-18) + (-23) + (-19)
Answer: -60 -
2. Algebra
What is the next term? 8, 32, 128, 512, ...
Answer: 2048 -
3. Geometry
Adjacent = 20cm, hypotenuse = 25cm. Find the angle
Answer: 36.9° -
4. Ratio
Find 21% of 387
Answer: 81.27 -
5. Statistics
A bag has 3 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 3⁄7