Keystones — Cornerstone
Five GCSE retrieval questions · 6 April 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄5 + 1⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 2x + 6 = 20
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 20cm and 21cm
Answer: 29cm -
4. Ratio Sharing in a ratio
Share 80 in the ratio 4:1
Answer: 64 and 16 -
5. Statistics Mean
Find the mean of: 17, 4, 12
Answer: 11