Keystones — Lintel
Five GCSE retrieval questions · 26 July 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 89 + ? = 168
Answer: 79 -
2. Algebra
Factorise fully: 35x² + 10x
Answer: 5x(7x + 2) -
3. Geometry
Opposite = 13cm, adjacent = 17cm. Calculate the angle
Answer: 37.4° -
4. Ratio
Simplify: 12:8:4
Answer: 3:2:1 -
5. Statistics
A bag has 7 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 7⁄15