Keystones — Capstone
Five GCSE retrieval questions · 28 December 2015 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: 3x² - 24x + 10
Answer: 3(x - 4)² - 38 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 17cm, angle = 80°. Give your answer to 2 decimal places
Answer: 209.27cm² -
4. Ratio Combining two ratios
a:b is 9:8 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 45:40:16 -
5. Statistics Averages and range
Find the mean, median and range of: 16, 94, 15, 66, 62, 70, 100, 15
Answer: Mean = 54.75, Median = 64, Range = 85