Keystones — Capstone
Five GCSE retrieval questions · 5 December 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √112
Answer: 4√7 -
2. Algebra Completing the square
Complete the square: 2x² + 8x + 11
Answer: 2(x + 2)² + 3 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 20cm, angle = 66°. Give your answer to 2 decimal places
Answer: 127.9cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 18:42:7 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 100, 74, 39, 84, 15, 32, 93. Give your answer to 2 decimal places
Answer: Mean = 59.88, Median = 58, Range = 85