Keystones — Capstone
Five GCSE retrieval questions · 19 March 2019 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √200
Answer: 10√2 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 2.5)² - 6.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 14cm, angle = 61°
Answer: 110.2cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 1:2. Find a:b:c.
Answer: 3:4:8 -
5. Statistics Averages and range
Find the mean, median and range of: 29, 28, 12, 29, 92, 62, 11, 36
Answer: Mean = 37.4, Median = 29, Range = 81