Keystones — Capstone
Five GCSE retrieval questions · 30 June 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √224
Answer: 4√14 -
2. Algebra Completing the square
Complete the square: x² - 3x + 6
Answer: (x - 3⁄2)² + 15⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 27cm, angle = 58°. Give your answer to 2 decimal places
Answer: 251.87cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 14:18:15 -
5. Statistics Averages and range
Find the mean, median and range of: 16, 37, 66, 45, 29, 58, 16, 64. Give your answer to 2 decimal places
Answer: Mean = 41.38, Median = 41, Range = 50