Keystones — Cornerstone
Five GCSE retrieval questions · 2 February 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄6 + 1⁄6
Answer: 2⁄3 -
2. Algebra Two-step equations
Solve: 5x + 3 = 63
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Share 52 in the ratio 3:1
Answer: 39 and 13 -
5. Statistics Mean
Calculate the mean of: 19, 44, 10, 19, 45, 7, 29. Give your answer to 2 decimal places
Answer: 24.71