Keystones — Cornerstone
Five GCSE retrieval questions · 9 September 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄3 + 5⁄7
Answer: 29⁄21 -
2. Algebra Two-step equations
Solve: 7x - 5 = 58
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 20cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Share 42 in the ratio 1:2
Answer: 14 and 28 -
5. Statistics Mean
Calculate the mean of: 43, 40, 36, 36, 47, 14, 32. Give your answer to 2 decimal places
Answer: 35.43