Keystones — Cornerstone
Five GCSE retrieval questions · 5 August 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄6 + 4⁄7
Answer: 26⁄21 -
2. Algebra Two-step equations
Solve: 8x - 16 = 88
Answer: x = 13 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 9cm. Give your answer to 2 decimal places
Answer: 14.21cm -
4. Ratio Sharing in a ratio
Divide 135 in the ratio 2:4:3
Answer: 30, 60 and 45 -
5. Statistics Mean
Calculate the mean of: 36, 46, 6, 17, 15, 49, 23. Give your answer to 2 decimal places
Answer: 27.43