Keystones — Capstone
Five GCSE retrieval questions · 11 May 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √272
Answer: 4√17 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 1
Answer: 4(x - 3)² - 35 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 21cm, angle = 55°. Give your answer to 2 decimal places
Answer: 240.83cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 4:7. Find a:b:c in its simplest form.
Answer: 28:36:63 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 56, 77, 27, 86, 61, 33, 17, 13. Give your answer to 2 decimal places
Answer: Mean = 44.44, Median = 33, Range = 73