Keystones — Capstone
Five GCSE retrieval questions · 16 January 2012 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √32
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: 4x² + 8x + 13
Answer: 4(x + 1)² + 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 27cm, angle = 59°. Give your answer to 2 decimal places
Answer: 277.72cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 5:20:32 -
5. Statistics Averages and range
Find the mean, median and range of: 22, 44, 82, 10, 98, 73, 12, 24, 84. Give your answer to 2 decimal places
Answer: Mean = 49.89, Median = 44, Range = 88