Keystones — Capstone
Five GCSE retrieval questions · 5 July 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 3√44
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: x² - 9x
Answer: (x - 9⁄2)² - 81⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 18cm, angle = 56°. Give your answer to 2 decimal places
Answer: 164.15cm² -
4. Ratio Combining two ratios
a:b is 5:9 and b:c is 7:1. Find a:b:c in its simplest form.
Answer: 35:63:9 -
5. Statistics Averages and range
Find the mean, median and range of: 27, 32, 16, 25, 26, 66, 74
Answer: Mean = 38, Median = 27, Range = 58