Keystones — Cornerstone
Five GCSE retrieval questions · 14 September 2021 · mathsvault.uk/keystones
-
1. Number
Calculate: 613 + 688
Answer: 613 + 688 = 1301 -
2. Algebra
Factorise: 2x² + 9x
Answer: x(2x + 9) -
3. Geometry
Calculate the hypotenuse when a = 11cm and b = 10cm
Answer: 14.87cm -
4. Ratio
Calculate 50% of 178
Answer: 89 -
5. Statistics
Calculate the mean of: 42, 6, 26, 14, 22, 23
Answer: 22.2