Keystones — Cornerstone
Five GCSE retrieval questions · 27 November 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 72 + ? = 188
Answer: 116 -
2. Algebra
Collect like terms: 6x + 8y + 8x + 8y
Answer: 14x + 16y -
3. Geometry
Calculate the perimeter of a right triangle with sides 11cm and 9cm
Answer: 34.2cm -
4. Ratio
Simplify: 10:10:6
Answer: 5:5:3 -
5. Statistics
Calculate the mean of: 34, 10, 36, 17, 38, 9, 13
Answer: 22.4