Keystones — Cornerstone
Five GCSE retrieval questions · 29 August 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 5⁄7 + 1⁄8
Answer: 47⁄56 -
2. Algebra Two-step equations
Solve: 5x + 14 = 39
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 16cm
Answer: 20cm -
4. Ratio Sharing in a ratio
Divide 128 in the ratio 3:2:3
Answer: 48, 32 and 48 -
5. Statistics Mean
Find the mean of: 9, 8, 9, 2
Answer: 7