Keystones — Cornerstone
Five GCSE retrieval questions · 27 November 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄4 + 1⁄6
Answer: 2⁄3 -
2. Algebra Two-step equations
Solve: 5x + 8 = 48
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 8cm. Give your answer to 2 decimal places
Answer: 13.6cm -
4. Ratio Sharing in a ratio
Divide 100 in the ratio 2:2:1
Answer: 40, 40 and 20 -
5. Statistics Mean
Calculate the mean of: 30, 23, 30, 7, 42, 29, 11, 31. Give your answer to 2 decimal places
Answer: 25.38