Keystones — Cornerstone
Five GCSE retrieval questions · 26 March 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄4 + 2⁄8
Answer: 1⁄1 -
2. Algebra Two-step equations
Solve: 5x - 5 = 35
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 15cm. Give your answer to 2 decimal places
Answer: 18.03cm -
4. Ratio Sharing in a ratio
Share 28 in the ratio 1:3
Answer: 7 and 21 -
5. Statistics Mean
Calculate the mean of: 15, 37, 21, 29, 21, 46. Give your answer to 2 decimal places
Answer: 28.17