Keystones — Cornerstone
Five GCSE retrieval questions · 11 April 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄5 + 2⁄3
Answer: 19⁄15 -
2. Algebra Two-step equations
Solve: 7x + 15 = 85
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 10cm. Give your answer to 2 decimal places
Answer: 11.18cm -
4. Ratio Sharing in a ratio
Share 30 in the ratio 2:1
Answer: 20 and 10 -
5. Statistics Mean
Find the mean of: 8, 2, 23, 11
Answer: 11