Keystones — Cornerstone
Five GCSE retrieval questions · 8 July 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄6 + 2⁄5
Answer: 17⁄30 -
2. Algebra Two-step equations
Solve: 7x + 5 = 82
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 11cm. Give your answer to 2 decimal places
Answer: 12.53cm -
4. Ratio Sharing in a ratio
Divide 152 in the ratio 2:3:3
Answer: 38, 57 and 57 -
5. Statistics Mean
Find the mean of: 17, 13, 4, 25, 6
Answer: 13