Keystones — Capstone
Five GCSE retrieval questions · 25 August 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √243
Answer: 9√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 = 22cm, b = 13cm, angle = 58°
Answer: 121.3cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 1:3. Find a:b:c.
Answer: 4:2:6 -
5. Statistics Averages and range
Find the mean, median and range of: 48, 30, 42, 48, 14, 59, 75
Answer: Mean = 45.1, Median = 48, Range = 61