Keystones — Lintel
Five GCSE retrieval questions · 25 September 2024 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 150. What are the numbers?
Answer: 49, 50, and 51 -
2. Algebra
Factorise fully: 9x² + 21x
Answer: 3x(3x + 7) -
3. Geometry
Adjacent = 16cm, hypotenuse = 27cm. Find the angle
Answer: 53.7° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
A bag has 6 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 2⁄3