Keystones — Lintel
Five GCSE retrieval questions · 31 December 2025 · mathsvault.uk/keystones
-
1. Number
The sum of three consecutive numbers is 111. What are the numbers?
Answer: 36, 37, and 38 -
2. Algebra
Find the next term: 1, 3, 7, 13, ...
Answer: 21 -
3. Geometry
Calculate the area of a right triangle with perpendicular sides 7cm and 13cm
Answer: 45.5cm² -
4. Ratio
Find 44% of 418
Answer: 183.92 -
5. Statistics
A bag has 4 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2