Keystones — Lintel
Five GCSE retrieval questions · 24 March 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 92 + ? = 189
Answer: 97 -
2. Algebra
Factorise fully: 20x² + 25x
Answer: 5x(4x + 5) -
3. Geometry
Calculate the area of a circle with diameter 20cm
Answer: 314.16cm² -
4. Ratio
Find 27% of 101
Answer: 27.27 -
5. Statistics
A spinner has 3 red, 6 blue and 3 green sections. Probability of landing on red?
Answer: 1⁄4