Keystones — Capstone
Five GCSE retrieval questions · 14 May 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √200
Answer: 10√2 -
2. Algebra Completing the square
Complete the square: 3x² + 6x - 11
Answer: 3(x + 1)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 25cm, angle = 45°. Give your answer to 2 decimal places
Answer: 256.33cm² -
4. Ratio Combining two ratios
a:b is 9:4 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 45:20:8 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 97, 86, 75, 95, 71, 71, 51, 76. Give your answer to 2 decimal places
Answer: Mean = 71.78, Median = 75, Range = 73