Keystones — Lintel
Five GCSE retrieval questions · 31 March 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 74 + ? = 122
Answer: 48 -
2. Algebra
Factorise fully: 14x² + 4x
Answer: 2x(7x + 2) -
3. Geometry
Find c if a = 20cm and b = 19cm in a right triangle
Answer: 27.6cm -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 40, 44, 48, 45, 33, 38
Answer: 41.3