Keystones — Capstone
Five GCSE retrieval questions · 28 April 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √896
Answer: 8√14 -
2. Algebra Completing the square
Complete the square: 3x² - 6x + 12
Answer: 3(x - 1)² + 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 14cm, angle = 47°. Give your answer to 2 decimal places
Answer: 138.23cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 2:3. Find a:b:c in its simplest form.
Answer: 16:10:15 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 88, 43, 13, 44, 19, 20. Give your answer to 2 decimal places
Answer: Mean = 38.43, Median = 42, Range = 75