Keystones — Capstone
Five GCSE retrieval questions · 16 June 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √792
Answer: 6√22 -
2. Algebra Completing the square
Complete the square: x² + x - 11
Answer: (x + 1⁄2)² - 45⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 28cm, angle = 63°. Give your answer to 2 decimal places
Answer: 199.59cm² -
4. Ratio Combining two ratios
a:b is 5:9 and b:c is 8:3. Find a:b:c in its simplest form.
Answer: 40:72:27 -
5. Statistics Averages and range
Find the mean, median and range of: 11, 18, 26, 73, 53, 22, 83. Give your answer to 2 decimal places
Answer: Mean = 40.86, Median = 26, Range = 72