Keystones — Cornerstone
Five GCSE retrieval questions · 16 August 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄6 + 4⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 4x + 11 = 23
Answer: x = 3 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 4cm and b = 15cm. Give your answer to 2 decimal places
Answer: 15.52cm -
4. Ratio Sharing in a ratio
Divide 120 in the ratio 2:2:1
Answer: 48, 48 and 24 -
5. Statistics Mean
Find the mean of: 17, 10, 8, 3, 2
Answer: 8