Keystones — Cornerstone
Five GCSE retrieval questions · 19 August 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄8 + 2⁄8
Answer: 3⁄4 -
2. Algebra Two-step equations
Solve: 4x + 8 = 20
Answer: x = 3 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 10cm. Give your answer to 2 decimal places
Answer: 11.66cm -
4. Ratio Sharing in a ratio
Divide 80 in the ratio 3:1:4
Answer: 30, 10 and 40 -
5. Statistics Mean
Find the mean of: 5, 20, 3, 18, 14
Answer: 12