Keystones — Lintel
Five GCSE retrieval questions · 6 December 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 480 + 520
Answer: 480 + 520 = 1000 -
2. Algebra
Factorise fully: 35x² + 15x
Answer: 5x(7x + 3) -
3. Geometry
Opposite = 17cm, adjacent = 9cm. Calculate the angle
Answer: 62.1° -
4. Ratio
Find 53% of 121
Answer: 64.13 -
5. Statistics
A bag has 5 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2