Keystones — Capstone
Five GCSE retrieval questions · 16 September 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 3.2x
Answer: (x + 1.6)² - 2.56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 20cm, angle = 72°
Answer: 133.cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 2:3. Find a:b:c.
Answer: 3:2:3 -
5. Statistics Averages and range
Find the mean, median and range of: 54, 85, 60, 19, 65, 39, 28, 13, 39
Answer: Mean = 44.7, Median = 39, Range = 72