Keystones — Cornerstone
Five GCSE retrieval questions · 29 April 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 6⁄8 + 2⁄7
Answer: 29⁄28 -
2. Algebra Two-step equations
Solve: 4x + 15 = 35
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 11cm. Give your answer to 2 decimal places
Answer: 11.4cm -
4. Ratio Sharing in a ratio
Share 108 in the ratio 1:2
Answer: 36 and 72 -
5. Statistics Mean
Find the mean of: 10, 4, 22, 12
Answer: 12