Keystones — Capstone
Five GCSE retrieval questions · 21 March 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √72
Answer: 6√2 -
2. Algebra Completing the square
Complete the square: x² - x + 8
Answer: (x - 1⁄2)² + 31⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 28cm, angle = 58°. Give your answer to 2 decimal places
Answer: 320.56cm² -
4. Ratio Combining two ratios
a:b is 5:2 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 35:14:16 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 34, 70, 13, 100, 30, 32, 32. Give your answer to 2 decimal places
Answer: Mean = 41.88, Median = 32, Range = 87