Keystones — Capstone
Five GCSE retrieval questions · 17 July 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √847
Answer: 11√7 -
2. Algebra Completing the square
Complete the square: 2x² - 8x - 12
Answer: 2(x - 2)² - 20 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 12cm, angle = 79°. Give your answer to 2 decimal places
Answer: 159.02cm² -
4. Ratio Combining two ratios
a:b is 1:3 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 5:15:18 -
5. Statistics Averages and range
Find the mean, median and range of: 53, 19, 41, 93, 13, 95, 26, 83, 69. Give your answer to 2 decimal places
Answer: Mean = 54.67, Median = 53, Range = 82