Keystones — Cornerstone
Five GCSE retrieval questions · 7 August 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 5⁄8 + 2⁄5
Answer: 41⁄40 -
2. Algebra Two-step equations
Solve: 7x + 13 = 76
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places
Answer: 12.21cm -
4. Ratio Sharing in a ratio
Divide 330 in the ratio 4:4:3
Answer: 120, 120 and 90 -
5. Statistics Mean
Find the mean of: 5, 6, 5, 17, 2
Answer: 7