Keystones — Capstone
Five GCSE retrieval questions · 6 June 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 2√24
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: x² + 7x - 2
Answer: (x + 7⁄2)² - 57⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 28cm, angle = 50°. Give your answer to 2 decimal places
Answer: 278.84cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 7:14:8 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 28, 39, 48, 95, 63, 100, 65
Answer: Mean = 62.5, Median = 62.5, Range = 72