Keystones — Lintel
Five GCSE retrieval questions · 16 June 2021 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 111. What are the numbers?
Answer: 36, 37, and 38 -
2. Algebra
Factorise fully: 15x² + 10x
Answer: 5x(3x + 2) -
3. Geometry
Adjacent = 18cm, hypotenuse = 30cm. Find the angle
Answer: 53.1° -
4. Ratio
Calculate 39.8% of 568
Answer: 226.06 -
5. Statistics
A bag has 7 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 7⁄15