Keystones — Cornerstone
Five GCSE retrieval questions · 14 October 2023 · mathsvault.uk/keystones
-
1. Number
Calculate: 73 + 93
Answer: 73 + 93 = 166 -
2. Algebra
Factorise: 7x² + 2x
Answer: x(7x + 2) -
3. Geometry
Calculate the area of a circle with diameter 22cm
Answer: 380.13cm² -
4. Ratio
Calculate 25% of 182
Answer: 45.5 -
5. Statistics
A bag has 6 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 2⁄3