Keystones — Capstone
Five GCSE retrieval questions · 3 March 2023 · mathsvault.uk/keystones
-
1. Number
Calculate: 1⁄2 + 3⁄6 + 2⁄4
Answer: 3⁄2 -
2. Algebra
Factorise fully: 20x² + 15x
Answer: 5x(4x + 3) -
3. Geometry
Adjacent = 17cm, hypotenuse = 30cm. Find the angle
Answer: 55.5° -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 25. If 5 of them are 25, 22, 46, 41, 45, what is the missing number?
Answer: -29