Keystones — Cornerstone
Five GCSE retrieval questions · 19 July 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄6 + 2⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 5x + 6 = 26
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 7cm and 24cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Share 85 in the ratio 4:1
Answer: 68 and 17 -
5. Statistics Mean
Calculate the mean of: 20, 18, 16, 43, 48, 31. Give your answer to 2 decimal places
Answer: 29.33