Keystones — Capstone
Five GCSE retrieval questions · 25 March 2020 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² + 5.6x
Answer: (x + 2.8)² - 7.84 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 29cm, angle = 66°
Answer: 198.7cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 2:3. Find a:b:c.
Answer: 8:6:9 -
5. Statistics Averages and range
Find the mean, median and range of: 96, 52, 45, 78, 21, 60, 90, 55, 10
Answer: Mean = 56.3, Median = 55, Range = 86