Keystones — Lintel
Five GCSE retrieval questions · 16 October 2026 · mathsvault.uk/keystones
-
1. Number Rounding to significant figures
Round 92.148 to 3 significant figures
Answer: 92.1 -
2. Algebra Linear nth term
Determine the nth term rule: -2, 5, 12, 19, 26, ...
Answer: 7n + -9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 13cm, angle = 55°
Answer: 127.8cm² -
4. Ratio Unitary method
7 kg costs £35.90. What is the cost of 19 kg?
Answer: £97.44 -
5. Statistics Mode
What are the modes of: 19, 35, 35, 21, 19, 35
Answer: 19 and 35