Keystones — Lintel
Five GCSE retrieval questions · 20 December 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 422 + 628
Answer: 422 + 628 = 1050 -
2. Algebra
Solve: 7x = 105
Answer: x = 15 -
3. Geometry
Opposite = 13cm, adjacent = 19cm. Calculate the angle
Answer: 34.4° -
4. Ratio
Simplify: 4:12:10
Answer: 2:6:5 -
5. Statistics
A bag has 3 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 3⁄10