Keystones — Cornerstone
Five GCSE retrieval questions · 25 April 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄5 + 5⁄6
Answer: 37⁄30 -
2. Algebra Two-step equations
Solve: 3x + 12 = 39
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 40cm
Answer: 41cm -
4. Ratio Sharing in a ratio
Share 18 in the ratio 2:1
Answer: 12 and 6 -
5. Statistics Mean
Find the mean of: 2, 19, 3
Answer: 8