Keystones — Cornerstone
Five GCSE retrieval questions · 31 August 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄8 + 6⁄7
Answer: 55⁄56 -
2. Algebra Two-step equations
Solve: 7x + 6 = 62
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 36cm
Answer: 39cm -
4. Ratio Sharing in a ratio
Divide 150 in the ratio 1:1:3
Answer: 30, 30 and 90 -
5. Statistics Mean
Calculate the mean of: 43, 17, 45, 14, 48, 5, 9, 31
Answer: 26.5