Keystones — Cornerstone
Five GCSE retrieval questions · 25 October 2024 · mathsvault.uk/keystones
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1. Number
Calculate: -41 + (-19)
Answer: -60 -
2. Algebra
Expand: 4(x + 5)
Answer: 4x + 20 -
3. Geometry
Opposite = 6cm, hypotenuse = 12cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Find 32% of 424
Answer: 135.68 -
5. Statistics
A bag has 4 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 4⁄11