Keystones — Cornerstone
Five GCSE retrieval questions · 5 November 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄8 + 4⁄7
Answer: 39⁄56 -
2. Algebra Two-step equations
Solve: 4x + 9 = 29
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 8cm. Give your answer to 2 decimal places
Answer: 12.81cm -
4. Ratio Sharing in a ratio
Divide 171 in the ratio 2:3:4
Answer: 38, 57 and 76 -
5. Statistics Mean
Calculate the mean of: 34, 15, 32, 50, 29, 33. Give your answer to 2 decimal places
Answer: 32.17