Keystones — Lintel
Five GCSE retrieval questions · 28 July 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 46 + ? = 177
Answer: 131 -
2. Algebra
Factorise: 5x² + 5x
Answer: 5x(x + 1) -
3. Geometry
Opposite = 20cm, adjacent = 9cm. Calculate the angle
Answer: 65.8° -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
A bag has 7 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 7⁄15