Keystones — Cornerstone
Five GCSE retrieval questions · 3 September 2021 · mathsvault.uk/keystones
-
1. Number
Calculate: -9 + (-9)
Answer: -18 -
2. Algebra
Solve: x + 3 = 22
Answer: x = 19 -
3. Geometry
Opposite = 10cm, adjacent = 19cm. Calculate the angle
Answer: 27.8° -
4. Ratio
Simplify the ratio 40:25
Answer: 8:5 -
5. Statistics
Find the mean of: 19, 18, 11, 16
Answer: 16