Keystones — Capstone
Five GCSE retrieval questions · 20 March 2018 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 2x
Answer: (x + 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 29cm, angle = 48°
Answer: 194cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 1:2. Find a:b:c.
Answer: 4:3:6 -
5. Statistics Averages and range
Find the mean, median and range of: 87, 33, 60, 32, 10, 21, 90
Answer: Mean = 47.6, Median = 33, Range = 80