Keystones — Cornerstone
Five GCSE retrieval questions · 23 February 2021 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄6 + 2⁄4
Answer: 2⁄3 -
2. Algebra Two-step equations
Solve: 4x - 19 = 17
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Share 45 in the ratio 2:1
Answer: 30 and 15 -
5. Statistics Mean
Find the mean of: 11, 5, 9, 18, 3
Answer: 9.2