Keystones — Capstone
Five GCSE retrieval questions · 20 July 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: 4x² + 24x + 15
Answer: 4(x + 3)² - 21 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 29cm, angle = 53°. Give your answer to 2 decimal places
Answer: 150.54cm² -
4. Ratio Combining two ratios
a:b is 5:3 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 20:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 29, 69, 80, 13, 37, 32, 72, 91. Give your answer to 2 decimal places
Answer: Mean = 52.88, Median = 53, Range = 78