Keystones — Cornerstone
Five GCSE retrieval questions · 30 March 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄6 + 3⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 7x + 3 = 87
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 8cm and b = 7cm. Give your answer to 2 decimal places
Answer: 10.63cm -
4. Ratio Sharing in a ratio
Divide 98 in the ratio 4:1:2
Answer: 56, 14 and 28 -
5. Statistics Mean
Find the mean of: 2, 17, 14
Answer: 11