Keystones — Cornerstone
Five GCSE retrieval questions · 6 July 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 6⁄7 + 2⁄4
Answer: 19⁄14 -
2. Algebra Two-step equations
Solve: 6x - 17 = 31
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
Divide 152 in the ratio 2:1:1
Answer: 76, 38 and 38 -
5. Statistics Mean
Calculate the mean of: 11, 7, 35, 33, 49, 37. Give your answer to 2 decimal places
Answer: 28.67