Keystones — Capstone
Five GCSE retrieval questions · 19 February 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √539
Answer: 7√11 -
2. Algebra Completing the square
Complete the square: 4x² + 32x - 11
Answer: 4(x + 4)² - 75 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 22cm, angle = 71°. Give your answer to 2 decimal places
Answer: 228.82cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 10:45:54 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 95, 98, 40, 41, 66, 41, 81, 15. Give your answer to 2 decimal places
Answer: Mean = 59.22, Median = 56, Range = 83