Keystones — Lintel
Five GCSE retrieval questions · 31 January 2026 · mathsvault.uk/keystones
-
1. Number Error intervals
65 is rounded to the nearest integer. What is the error interval?
Answer: 64.5 ≤ x < 65.5 -
2. Algebra Expanding two brackets
Expand: (x + 2)(x - 7)
Answer: x² -5x - 14 -
3. Geometry Area of a circle
Calculate the area of a circle with diameter 19cm
Answer: 283.53cm² -
4. Ratio One amount as a percentage of another
52 out of 97 students passed. What percentage passed?
Answer: 53.6% -
5. Statistics Averages and range
Find the mean, mode, median and range of: 14, 39, 37, 22, 22
Answer: Mean = 26.8, Mode = 22, Median = 22, Range = 25