Keystones — Capstone
Five GCSE retrieval questions · 13 January 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √72
Answer: 6√2 -
2. Algebra Completing the square
Complete the square: 2x² - 20x + 14
Answer: 2(x - 5)² - 36 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 26cm, angle = 60°. Give your answer to 2 decimal places
Answer: 225.17cm² -
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: 33, 29, 24, 74, 90, 23, 73, 99. Give your answer to 2 decimal places
Answer: Mean = 55.63, Median = 53, Range = 76