Keystones — Capstone
Five GCSE retrieval questions · 26 July 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √245
Answer: 7√5 -
2. Algebra Completing the square
Complete the square: 2x² - 4x + 13
Answer: 2(x - 1)² + 11 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 27cm, angle = 71°. Give your answer to 2 decimal places
Answer: 153.17cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 21:12:32 -
5. Statistics Averages and range
Find the mean, median and range of: 96, 96, 22, 71, 78, 75, 94
Answer: Mean = 76, Median = 78, Range = 74