Keystones — Cornerstone
Five GCSE retrieval questions · 11 July 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄3 + 3⁄8
Answer: 25⁄24 -
2. Algebra Two-step equations
Solve: 8x - 12 = 76
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 5cm and 12cm
Answer: 13cm -
4. Ratio Sharing in a ratio
Divide 117 in the ratio 3:4:2
Answer: 39, 52 and 26 -
5. Statistics Mean
Find the mean of: 14, 5, 3, 19, 24
Answer: 13