Keystones — Capstone
Five GCSE retrieval questions · 10 May 2022 · mathsvault.uk/keystones
-
1. Number
The sum of three consecutive numbers is 93. What are the numbers?
Answer: 30, 31, and 32 -
2. Algebra
Factorise fully: 21x² + 15x
Answer: 3x(7x + 5) -
3. Geometry
Adjacent = 20cm, hypotenuse = 32cm. Find the angle
Answer: 51.3° -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 22. If 5 of them are 30, 24, 21, 16, 42, what is the missing number?
Answer: -1