Keystones — Capstone
Five GCSE retrieval questions · 14 January 2013 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √792
Answer: 6√22 -
2. Algebra Completing the square
Complete the square: 2x² - 16x - 11
Answer: 2(x - 4)² - 43 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 22cm, angle = 67°. Give your answer to 2 decimal places
Answer: 232.89cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 24:30:35 -
5. Statistics Averages and range
Find the mean, median and range of: 39, 15, 59, 91, 17, 84, 88, 22, 59. Give your answer to 2 decimal places
Answer: Mean = 52.67, Median = 59, Range = 76