Keystones — Capstone
Five GCSE retrieval questions · 23 July 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √125
Answer: 5√5 -
2. Algebra Completing the square
Complete the square: 5x² + 40x - 3
Answer: 5(x + 4)² - 83 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 26cm, angle = 64°. Give your answer to 2 decimal places
Answer: 315.48cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 8:5. Find a:b:c in its simplest form.
Answer: 32:40:25 -
5. Statistics Averages and range
Find the mean, median and range of: 31, 28, 31, 16, 23, 40, 53, 64
Answer: Mean = 35.75, Median = 31, Range = 48