Keystones — Capstone
Five GCSE retrieval questions · 13 September 2020 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 2.5)² - 6.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 15cm, angle = 60°
Answer: 103.9cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 4:5. Find a:b:c.
Answer: 3:4:5 -
5. Statistics Averages and range
Find the mean, median and range of: 46, 88, 52, 23, 72, 31, 91
Answer: Mean = 57.6, Median = 52, Range = 68