Keystones — Capstone
Five GCSE retrieval questions · 28 August 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √360
Answer: 6√10 -
2. Algebra Completing the square
Complete the square: 4x² - 40x + 6
Answer: 4(x - 5)² - 94 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 20cm, angle = 63°. Give your answer to 2 decimal places
Answer: 267.3cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 3:12:20 -
5. Statistics Averages and range
Find the mean, median and range of: 40, 49, 97, 26, 14, 17, 21. Give your answer to 2 decimal places
Answer: Mean = 37.71, Median = 26, Range = 83