Keystones — Capstone
Five GCSE retrieval questions · 14 July 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √700
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: 2x² + 24x - 14
Answer: 2(x + 6)² - 86 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 15cm, angle = 51°. Give your answer to 2 decimal places
Answer: 174.86cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 10:35:14 -
5. Statistics Averages and range
Find the mean, median and range of: 17, 21, 73, 17, 60, 60, 58. Give your answer to 2 decimal places
Answer: Mean = 43.71, Median = 58, Range = 56