Keystones — Capstone
Five GCSE retrieval questions · 19 January 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √700
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: 5x² - 50x + 8
Answer: 5(x - 5)² - 117 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 12cm, angle = 46°. Give your answer to 2 decimal places
Answer: 120.85cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 2:1. Find a:b:c in its simplest form.
Answer: 4:6:3 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 11, 37, 65, 72, 49, 39, 44, 81. Give your answer to 2 decimal places
Answer: Mean = 46.33, Median = 44, Range = 70