Keystones — Lintel
Five GCSE retrieval questions · 28 August 2026 · mathsvault.uk/keystones
-
1. Number Rounding to significant figures
Round 86.244 to 3 significant figures
Answer: 86.2 -
2. Algebra Linear nth term
Find the nth term: 36, 32, 28, 24, ...
Answer: 40 - 4n -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 30cm, angle = 71°
Answer: 425.5cm² -
4. Ratio Unitary method
If 6 items cost £26.80, how many items can you buy for £51.20?
Answer: 11.5 items -
5. Statistics Mode
Find the mode of: 19, 26, 47, 56, 73
Answer: No mode