Keystones — Cornerstone
Five GCSE retrieval questions · 30 November 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄5 + 2⁄4
Answer: 7⁄10 -
2. Algebra Two-step equations
Solve: 7x - 5 = 44
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places
Answer: 15.3cm -
4. Ratio Sharing in a ratio
Divide 98 in the ratio 3:1:3
Answer: 42, 14 and 42 -
5. Statistics Mean
Find the mean of: 20, 19, 6
Answer: 15