Keystones — Cornerstone
Five GCSE retrieval questions · 22 May 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 85 + ? = 117
Answer: 32 -
2. Algebra
Solve: 3x = 42
Answer: x = 14 -
3. Geometry
Calculate the perimeter of a right triangle with sides 10cm and 11cm
Answer: 35.9cm -
4. Ratio
Simplify: 8:6:8
Answer: 4:3:4 -
5. Statistics
Find the mean of: 15, 18, 6, 11, 3
Answer: 10.6