Keystones — Cornerstone
Five GCSE retrieval questions · 2 December 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄7 + 1⁄3
Answer: 19⁄21 -
2. Algebra Two-step equations
Solve: 8x - 8 = 104
Answer: x = 14 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Divide 161 in the ratio 2:1:4
Answer: 46, 23 and 92 -
5. Statistics Mean
Find the mean of: 9, 10, 6, 12, 18
Answer: 11