Keystones — Capstone
Five GCSE retrieval questions · 21 May 2019 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √242
Answer: 11√2 -
2. Algebra Completing the square
Complete the square: x² + 4.6x
Answer: (x + 2.3)² - 5.29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 18cm, angle = 67°
Answer: 174cm² -
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: 13, 51, 88, 10, 38, 78, 97, 84
Answer: Mean = 57.4, Median = 78, Range = 87