Keystones — Cornerstone
Five GCSE retrieval questions · 7 August 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄5 + 3⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 6x + 4 = 70
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 9cm. Give your answer to 2 decimal places
Answer: 10.3cm -
4. Ratio Sharing in a ratio
Divide 240 in the ratio 2:1:2
Answer: 96, 48 and 96 -
5. Statistics Mean
Find the mean of: 4, 11, 18, 15
Answer: 12