Keystones — Cornerstone
Five GCSE retrieval questions · 19 July 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄10 + 5⁄10
Answer: 7⁄10 -
2. Algebra Two-step equations
Solve: 6x - 17 = 31
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 5cm and 12cm
Answer: 13cm -
4. Ratio Sharing in a ratio
Share 100 in the ratio 2:3
Answer: 40 and 60 -
5. Statistics Mean
Calculate the mean of: 34, 25, 16, 21, 39, 45, 39, 38. Give your answer to 2 decimal places
Answer: 32.13