Keystones — Capstone
Five GCSE retrieval questions · 2 September 2018 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √242
Answer: 11√2 -
2. Algebra Completing the square
Complete the square: x² + 4x
Answer: (x + 2)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 28cm, angle = 40°
Answer: 135cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 3:5. Find a:b:c.
Answer: 2:3:5 -
5. Statistics Averages and range
Find the mean, median and range of: 85, 36, 65, 27, 74, 32, 26, 98, 95
Answer: Mean = 59.8, Median = 65, Range = 72