Keystones — Cornerstone
Five GCSE retrieval questions · 27 April 2023 · mathsvault.uk/keystones
-
1. Number
What is the missing number: 51 + ? = 108
Answer: 57 -
2. Algebra
Solve: 3x = 12
Answer: x = 4 -
3. Geometry
Opposite = 12cm, hypotenuse = 24cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify the ratio 12:18
Answer: 2:3 -
5. Statistics
Calculate the mean of: 26, 9, 22, 15, 31, 12, 48
Answer: 23.3