Keystones — Cornerstone
Five GCSE retrieval questions · 21 August 2018 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄7 + 2⁄4
Answer: 15⁄14 -
2. Algebra Two-step equations
Solve: 7x + 14 = 49
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 150 in the ratio 1:1:3
Answer: 30, 30 and 90 -
5. Statistics Mean
Find the mean of: 5, 5, 20, 17, 3
Answer: 10