Keystones — Lintel
Five GCSE retrieval questions · 24 August 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 73 + ? = 123
Answer: 50 -
2. Algebra
For y = x³ + 9, calculate y when x = 3
Answer: y = 36 -
3. Geometry
Find c if a = 17cm and b = 18cm in a right triangle
Answer: 24.8cm -
4. Ratio
Calculate 22.9% of 901
Answer: 206.33 -
5. Statistics
A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 6⁄11