Keystones — Lintel
Five GCSE retrieval questions · 4 April 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 147. What are the numbers?
Answer: 48, 49, and 50 -
2. Algebra
Find the next term: 1, 3, 7, 13, ...
Answer: 21 -
3. Geometry
Adjacent = 20cm, hypotenuse = 26cm. Find the angle
Answer: 39.7° -
4. Ratio
Calculate 45.7% of 621
Answer: 283.8 -
5. Statistics
Calculate the mean of: 10, 19, 40, 20, 50, 25, 34, 13
Answer: 26.4