Keystones — Cornerstone
Five GCSE retrieval questions · 30 October 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄12 + 4⁄12
Answer: 11⁄12 -
2. Algebra Two-step equations
Solve: 2x + 8 = 16
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 4cm. Give your answer to 2 decimal places
Answer: 7.21cm -
4. Ratio Sharing in a ratio
Share 40 in the ratio 3:1
Answer: 30 and 10 -
5. Statistics Mean
Find the mean of: 4, 11, 21
Answer: 12