Keystones — Capstone
Five GCSE retrieval questions · 18 April 2020 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √242
Answer: 11√2 -
2. Algebra Completing the square
Complete the square: x² + 2.8x
Answer: (x + 1.4)² - 1.96 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 14cm, angle = 50°
Answer: 150.cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 2:3. Find a:b:c.
Answer: 8:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 87, 25, 14, 54, 10, 10, 57
Answer: Mean = 34.5, Median = 25, Range = 77