Keystones — Capstone
Five GCSE retrieval questions · 11 April 2021 · mathsvault.uk/keystones
-
1. Number
The sum of three consecutive numbers is 123. What are the numbers?
Answer: 40, 41, and 42 -
2. Algebra
Factorise fully: 21x² + 12x
Answer: 3x(7x + 4) -
3. Geometry
Adjacent = 25cm, hypotenuse = 43cm. Find the angle
Answer: 54.5° -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 24. If 5 of them are 48, 29, 24, 45, 46, what is the missing number?
Answer: -48