Keystones — Capstone
Five GCSE retrieval questions · 4 June 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √384
Answer: 8√6 -
2. Algebra Completing the square
Complete the square: 4x² + 40x - 9
Answer: 4(x + 5)² - 109 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 27cm, angle = 46°. Give your answer to 2 decimal places
Answer: 184.51cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 15:24:64 -
5. Statistics Averages and range
Find the mean, median and range of: 55, 25, 17, 93, 90, 73, 30, 31, 42. Give your answer to 2 decimal places
Answer: Mean = 50.67, Median = 42, Range = 76