Keystones — Cornerstone
Five GCSE retrieval questions · 21 December 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 87 + 93
Answer: 87 + 93 = 180 -
2. Algebra
Find the next term: 24, 28, 32, 36, ...
Answer: 40 -
3. Geometry
Calculate perimeter: two sides are 8cm and 9cm at right angles
Answer: 29cm -
4. Ratio
Simplify: 8:24:20
Answer: 2:6:5 -
5. Statistics
Calculate the mean of: 18, 37, 21, 30, 9, 34, 41
Answer: 27.1