Keystones — Cornerstone
Five GCSE retrieval questions · 17 March 2025 · mathsvault.uk/keystones
-
1. Number
Find the total of 170, 286, and 139
Answer: 595 -
2. Algebra
Factorise: 16x + 20
Answer: 4(4x + 5) -
3. Geometry
Opposite = 5cm, hypotenuse = 10cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Find 75% of 341
Answer: 255.75 -
5. Statistics
A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 4⁄9