Keystones — Capstone
Five GCSE retrieval questions · 23 May 2013 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √162
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: 2x² - 16x + 13
Answer: 2(x - 4)² - 19 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 20cm, angle = 63°. Give your answer to 2 decimal places
Answer: 231.66cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 9:12:10 -
5. Statistics Averages and range
Find the mean, median and range of: 80, 65, 56, 51, 45, 64, 88, 94. Give your answer to 2 decimal places
Answer: Mean = 67.88, Median = 64.5, Range = 49