Keystones — Lintel
Five GCSE retrieval questions · 25 November 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 95 + ? = 134
Answer: 39 -
2. Algebra
Factorise fully: 21x² + 12x
Answer: 3x(7x + 4) -
3. Geometry
Find c if a = 11cm and b = 12cm in a right triangle
Answer: 16.3cm -
4. Ratio
Simplify: 15:18:15
Answer: 5:6:5 -
5. Statistics
Calculate the mean of: 28, 24, 5, 13, 16, 24, 48
Answer: 22.6