Keystones — Cornerstone
Five GCSE retrieval questions · 27 July 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄4 + 2⁄3
Answer: 11⁄12 -
2. Algebra Two-step equations
Solve: 2x + 15 = 39
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 20cm and 21cm
Answer: 29cm -
4. Ratio Sharing in a ratio
Share 40 in the ratio 1:4
Answer: 8 and 32 -
5. Statistics Mean
Find the mean of: 20, 3, 8, 17
Answer: 12