Keystones — Cornerstone
Five GCSE retrieval questions · 17 September 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄4 + 4⁄6
Answer: 7⁄6 -
2. Algebra Two-step equations
Solve: 8x - 12 = 60
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
Share 50 in the ratio 2:3
Answer: 20 and 30 -
5. Statistics Mean
Calculate the mean of: 6, 21, 44, 7, 13, 38, 29. Give your answer to 2 decimal places
Answer: 22.57