Keystones — Cornerstone
Five GCSE retrieval questions · 23 October 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄7 + 1⁄7
Answer: 2⁄7 -
2. Algebra Two-step equations
Solve: 2x + 3 = 25
Answer: x = 11 -
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 120 in the ratio 1:2:2
Answer: 24, 48 and 48 -
5. Statistics Mean
Find the mean of: 9, 13, 6, 20
Answer: 12