Keystones — Capstone
Five GCSE retrieval questions · 8 October 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 3√44
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 4x² + 16x - 13
Answer: 4(x + 2)² - 29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 22cm, angle = 62°. Give your answer to 2 decimal places
Answer: 145.69cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 15:35:56 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 51, 77, 71, 91, 43, 73, 72, 24. Give your answer to 2 decimal places
Answer: Mean = 58.44, Median = 71, Range = 67