Keystones — Capstone
Five GCSE retrieval questions · 26 March 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √252
Answer: 6√7 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 5
Answer: 4(x - 1)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 29cm, angle = 50°. Give your answer to 2 decimal places
Answer: 277.69cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 7:2. Find a:b:c in its simplest form.
Answer: 49:28:8 -
5. Statistics Averages and range
Find the mean, median and range of: 43, 31, 100, 74, 22, 25, 53, 80, 23. Give your answer to 2 decimal places
Answer: Mean = 50.11, Median = 43, Range = 78