Keystones — Cornerstone
Five GCSE retrieval questions · 26 September 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄7 + 3⁄6
Answer: 13⁄14 -
2. Algebra Two-step equations
Solve: 4x + 8 = 52
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 4cm and b = 8cm. Give your answer to 2 decimal places
Answer: 8.94cm -
4. Ratio Sharing in a ratio
Share 80 in the ratio 2:3
Answer: 32 and 48 -
5. Statistics Mean
Find the mean of: 20, 17, 6, 9, 23
Answer: 15