Keystones — Capstone
Five GCSE retrieval questions · 24 October 2025 · mathsvault.uk/keystones
-
1. Number
The sum of three consecutive numbers is 129. What are the numbers?
Answer: 42, 43, and 44 -
2. Algebra
Find the next term: 1, 3, 7, 13, ...
Answer: 21 -
3. Geometry
A right triangle has hypotenuse 17cm and one side 8cm. Find its area
Answer: 60cm² -
4. Ratio
Calculate 43.9% of 706
Answer: 309.93 -
5. Statistics
The mean of 5 numbers is 25. If 4 of them are 45, 15, 20, 25, what is the missing number?
Answer: 20