Keystones — Cornerstone
Five GCSE retrieval questions · 19 April 2021 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄5 + 2⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 8x - 5 = 75
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Divide 225 in the ratio 3:2:4
Answer: 75, 50 and 100 -
5. Statistics Mean
Find the mean of: 2, 13, 18, 16
Answer: 12.25