Keystones — Cornerstone
Five GCSE retrieval questions · 23 September 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄3 + 1⁄7
Answer: 10⁄21 -
2. Algebra Two-step equations
Solve: 7x + 4 = 32
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 6cm and 8cm
Answer: 10cm -
4. Ratio Sharing in a ratio
Divide 160 in the ratio 1:2:1
Answer: 40, 80 and 40 -
5. Statistics Mean
Find the mean of: 8, 20, 7, 5
Answer: 10