Keystones — Lintel
Five GCSE retrieval questions · 6 May 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 41 + ? = 188
Answer: 147 -
2. Algebra
Factorise: 2x² + 6x
Answer: 2x(x + 3) -
3. Geometry
Opposite = 17cm, adjacent = 9cm. Calculate the angle
Answer: 62.1° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
A bag has 5 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2