Keystones — Lintel
Five GCSE retrieval questions · 17 October 2026 · mathsvault.uk/keystones
-
1. Number Rounding to significant figures
Round 1692 to 2 significant figures
Answer: 1700 -
2. Algebra Linear nth term
Find the nth term: 29, 27, 25, 23, ...
Answer: 31 - 2n -
3. Geometry Area using ½ab sin C
Calculate area: sides 16cm and 18cm, included angle 30°
Answer: 72cm² -
4. Ratio Unitary method
10 kg costs £49.70. What is the cost of 14 kg?
Answer: £69.58 -
5. Statistics Mode
Find the mode of: 77, 25, 41, 15, 59
Answer: No mode