Keystones — Capstone
Five GCSE retrieval questions · 29 February 2020 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √162
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: x² + 5.4x
Answer: (x + 2.7)² - 7.29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 16cm, angle = 53°
Answer: 121.4cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 3:5. Find a:b:c.
Answer: 4:3:5 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 88, 67, 76, 85, 24, 73, 76
Answer: Mean = 65.5, Median = 76, Range = 64