Keystones — Cornerstone
Five GCSE retrieval questions · 12 August 2021 · mathsvault.uk/keystones
-
1. Number
Calculate: 45 + 84
Answer: 45 + 84 = 129 -
2. Algebra
Collect like terms: 3x + 2y + 4x + 8y
Answer: 7x + 10y -
3. Geometry
Find the perimeter of a right triangle with sides 3cm and 4cm
Answer: 12cm -
4. Ratio
Calculate 50% of 115
Answer: 57.5 -
5. Statistics
Calculate the mean of: 27, 40, 9, 29, 34, 6, 44
Answer: 27