Keystones — Capstone
Five GCSE retrieval questions · 14 August 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 5√18
Answer: 15√2 -
2. Algebra Completing the square
Complete the square: 4x² - 8x + 11
Answer: 4(x - 1)² + 7 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 14cm, angle = 47°. Give your answer to 2 decimal places
Answer: 66.55cm² -
4. Ratio Combining two ratios
a:b is 9:5 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 63:35:40 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 100, 41, 33, 59, 93, 48, 31. Give your answer to 2 decimal places
Answer: Mean = 53.63, Median = 44.5, Range = 76