Keystones — Cornerstone
Five GCSE retrieval questions · 11 March 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄5 + 1⁄4
Answer: 13⁄20 -
2. Algebra Two-step equations
Solve: 3x - 16 = 20
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 11cm. Give your answer to 2 decimal places
Answer: 12.08cm -
4. Ratio Sharing in a ratio
Share 126 in the ratio 3:4
Answer: 54 and 72 -
5. Statistics Mean
Calculate the mean of: 19, 15, 30, 45, 28, 32, 5, 31. Give your answer to 2 decimal places
Answer: 25.63