Keystones — Cornerstone
Five GCSE retrieval questions · 28 July 2021 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄5 + 6⁄7
Answer: 51⁄35 -
2. Algebra Two-step equations
Solve: 7x - 13 = 43
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 20cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Divide 85 in the ratio 2:2:1
Answer: 34, 34 and 17 -
5. Statistics Mean
Find the mean of: 5, 8, 17, 20
Answer: 12.5