Keystones — Capstone
Five GCSE retrieval questions · 24 June 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √960
Answer: 8√15 -
2. Algebra Completing the square
Complete the square: 4x² - 40x - 4
Answer: 4(x - 5)² - 104 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 12cm, angle = 56°. Give your answer to 2 decimal places
Answer: 129.33cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 35:42:36 -
5. Statistics Averages and range
Find the mean, median and range of: 74, 73, 79, 83, 61, 68, 31, 66, 65. Give your answer to 2 decimal places
Answer: Mean = 66.67, Median = 68, Range = 52