Keystones — Capstone
Five GCSE retrieval questions · 29 March 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 4√45
Answer: 12√5 -
2. Algebra Completing the square
Complete the square: 3x² + 30x - 8
Answer: 3(x + 5)² - 83 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 29cm, angle = 73°. Give your answer to 2 decimal places
Answer: 332.79cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 8:1. Find a:b:c in its simplest form.
Answer: 64:24:3 -
5. Statistics Averages and range
Find the mean, median and range of: 82, 63, 98, 49, 67, 97, 36, 16
Answer: Mean = 63.5, Median = 65, Range = 82