Keystones — Capstone
Five GCSE retrieval questions · 14 February 2015 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √931
Answer: 7√19 -
2. Algebra Completing the square
Complete the square: 2x² + 8x + 11
Answer: 2(x + 2)² + 3 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 17cm, angle = 55°. Give your answer to 2 decimal places
Answer: 160.14cm² -
4. Ratio Combining two ratios
a:b is 5:3 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 20:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 87, 84, 37, 81, 95, 100, 32. Give your answer to 2 decimal places
Answer: Mean = 73.71, Median = 84, Range = 68