Keystones — Capstone
Five GCSE retrieval questions · 16 August 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √375
Answer: 5√15 -
2. Algebra Completing the square
Complete the square: 3x² - 24x + 10
Answer: 3(x - 4)² - 38 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 27cm, angle = 73°. Give your answer to 2 decimal places
Answer: 167.83cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 6:15:40 -
5. Statistics Averages and range
Find the mean, median and range of: 15, 16, 26, 28, 52, 76, 51. Give your answer to 2 decimal places
Answer: Mean = 37.71, Median = 28, Range = 61