Keystones — Lintel
Five GCSE retrieval questions · 9 December 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 997 + 919
Answer: 997 + 919 = 1916 -
2. Algebra
Factorise fully: 20x² + 24x
Answer: 4x(5x + 6) -
3. Geometry
Find c if a = 9cm and b = 21cm in a right triangle
Answer: 22.8cm -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
A spinner has 6 red, 5 blue and 2 green sections. Probability of landing on red?
Answer: 6⁄13