Keystones — Cornerstone
Five GCSE retrieval questions · 24 September 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄3 + 4⁄6
Answer: 4⁄3 -
2. Algebra Two-step equations
Solve: 4x - 13 = 19
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 16cm
Answer: 20cm -
4. Ratio Sharing in a ratio
Share 68 in the ratio 3:1
Answer: 51 and 17 -
5. Statistics Mean
Calculate the mean of: 32, 38, 12, 26, 48, 16, 39. Give your answer to 2 decimal places
Answer: 30.14