Keystones — Cornerstone
Five GCSE retrieval questions · 2 May 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄3 + 2⁄8
Answer: 7⁄12 -
2. Algebra Two-step equations
Solve: 5x - 19 = 1
Answer: x = 4 -
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 100 in the ratio 4:1
Answer: 80 and 20 -
5. Statistics Mean
Find the mean of: 20, 6, 10, 22, 2
Answer: 12