Keystones — Cornerstone
Five GCSE retrieval questions · 11 November 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄3 + 2⁄5
Answer: 16⁄15 -
2. Algebra Two-step equations
Solve: 4x - 11 = 17
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Share 84 in the ratio 3:4
Answer: 36 and 48 -
5. Statistics Mean
Find the mean of: 5, 14, 13, 8, 20
Answer: 12