Keystones — Capstone
Five GCSE retrieval questions · 12 October 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √700
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: 4x² - 40x + 5
Answer: 4(x - 5)² - 95 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 24cm, angle = 54°. Give your answer to 2 decimal places
Answer: 155.33cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 3:4. Find a:b:c in its simplest form.
Answer: 21:24:32 -
5. Statistics Averages and range
Find the mean, median and range of: 70, 73, 46, 88, 18, 93, 30, 69, 21. Give your answer to 2 decimal places
Answer: Mean = 56.44, Median = 69, Range = 75