Keystones — Lintel
Five GCSE retrieval questions · 14 December 2025 · mathsvault.uk/keystones
-
1. Number
What is the missing number: 39 + ? = 144
Answer: 105 -
2. Algebra
For y = x³ + 2, calculate y when x = 4
Answer: y = 66 -
3. Geometry
Opposite = 10cm, adjacent = 17cm. Calculate the angle
Answer: 30.5° -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
Find the range of: 31, 4, 33, -13, -25
Answer: 58