Keystones — Cornerstone
Five GCSE retrieval questions · 17 September 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄5 + 5⁄7
Answer: 32⁄35 -
2. Algebra Two-step equations
Solve: 6x + 5 = 47
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 4cm. Give your answer to 2 decimal places
Answer: 6.4cm -
4. Ratio Sharing in a ratio
Divide 198 in the ratio 2:4:3
Answer: 44, 88 and 66 -
5. Statistics Mean
Find the mean of: 10, 14, 3
Answer: 9