Keystones — Cornerstone
Five GCSE retrieval questions · 4 August 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄8 + 3⁄6
Answer: 7⁄8 -
2. Algebra Two-step equations
Solve: 3x - 15 = 0
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 20cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Share 24 in the ratio 2:1
Answer: 16 and 8 -
5. Statistics Mean
Calculate the mean of: 22, 31, 32, 40, 17, 21. Give your answer to 2 decimal places
Answer: 27.17