Keystones — Lintel
Five GCSE retrieval questions · 25 July 2024 · mathsvault.uk/keystones
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1. Number
What is the missing number: 72 + ? = 100
Answer: 28 -
2. Algebra
Solve: 3x = 30
Answer: x = 10 -
3. Geometry
Find c if a = 8cm and b = 19cm in a right triangle
Answer: 20.6cm -
4. Ratio
Simplify: 20:20:16
Answer: 5:5:4 -
5. Statistics
Calculate the mean of: 37, 6, 6, 45, 39, 15, 23
Answer: 24.4