Keystones — Capstone
Five GCSE retrieval questions · 7 November 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 3√96
Answer: 12√6 -
2. Algebra Completing the square
Complete the square: x² - 11x + 2
Answer: (x - 11⁄2)² - 113⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 19cm, angle = 77°. Give your answer to 2 decimal places
Answer: 175.87cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 15:35:42 -
5. Statistics Averages and range
Find the mean, median and range of: 57, 71, 78, 46, 51, 66, 14, 86. Give your answer to 2 decimal places
Answer: Mean = 58.63, Median = 61.5, Range = 72