Keystones — Cornerstone
Five GCSE retrieval questions · 4 April 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 8⁄12 + 1⁄12
Answer: 3⁄4 -
2. Algebra Two-step equations
Solve: 7x - 19 = 44
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Divide 125 in the ratio 2:2:1
Answer: 50, 50 and 25 -
5. Statistics Mean
Calculate the mean of: 18, 10, 19, 6, 49, 15, 38. Give your answer to 2 decimal places
Answer: 22.14