Keystones — Capstone
Five GCSE retrieval questions · 3 July 2013 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √32
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: x² + 11x
Answer: (x + 11⁄2)² - 121⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 14cm, angle = 72°. Give your answer to 2 decimal places
Answer: 79.89cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 2:5. Find a:b:c in its simplest form.
Answer: 16:14:35 -
5. Statistics Averages and range
Find the mean, median and range of: 52, 23, 76, 18, 90, 81, 59, 33, 53. Give your answer to 2 decimal places
Answer: Mean = 53.89, Median = 53, Range = 72