Keystones — Cornerstone
Five GCSE retrieval questions · 20 October 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄8 + 3⁄6
Answer: 5⁄8 -
2. Algebra Two-step equations
Solve: 6x + 12 = 48
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places
Answer: 12.21cm -
4. Ratio Sharing in a ratio
Divide 144 in the ratio 4:1:4
Answer: 64, 16 and 64 -
5. Statistics Mean
Find the mean of: 8, 16, 2, 9, 20
Answer: 11