Keystones — Cornerstone
Five GCSE retrieval questions · 20 May 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 76 + ? = 142
Answer: 66 -
2. Algebra
Solve: x + 3 = 18
Answer: x = 15 -
3. Geometry
Opposite = 15cm, adjacent = 18cm. Calculate the angle
Answer: 39.8° -
4. Ratio
Find 36% of 75
Answer: 27 -
5. Statistics
Calculate the mean of: 13, 27, 34, 34, 41, 22, 35
Answer: 29.4