Keystones — Cornerstone
Five GCSE retrieval questions · 7 August 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 7⁄8 + 1⁄3
Answer: 29⁄24 -
2. Algebra Two-step equations
Solve: 7x - 7 = 42
Answer: x = 7 -
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 80 in the ratio 1:3
Answer: 20 and 60 -
5. Statistics Mean
Calculate the mean of: 14, 29, 6, 6, 21, 34. Give your answer to 2 decimal places
Answer: 18.33