Keystones — Cornerstone
Five GCSE retrieval questions · 26 October 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄7 + 5⁄6
Answer: 47⁄42 -
2. Algebra Two-step equations
Solve: 7x - 18 = 24
Answer: x = 6 -
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 50 in the ratio 3:2
Answer: 30 and 20 -
5. Statistics Mean
Find the mean of: 6, 14, 9, 7
Answer: 9