Keystones — Lintel
Five GCSE retrieval questions · 16 February 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 102. What are the numbers?
Answer: 33, 34, and 35 -
2. Algebra
Expand: 5(5x - 2)
Answer: 25x - 10 -
3. Geometry
Find c if a = 20cm and b = 20cm in a right triangle
Answer: 28.3cm -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 32, 23, 27, 37, 30, 30
Answer: 29.8