Keystones — Cornerstone
Five GCSE retrieval questions · 26 December 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄6 + 1⁄4
Answer: 7⁄12 -
2. Algebra Two-step equations
Solve: 5x - 11 = 44
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 20cm and 21cm
Answer: 29cm -
4. Ratio Sharing in a ratio
Divide 144 in the ratio 3:4:2
Answer: 48, 64 and 32 -
5. Statistics Mean
Calculate the mean of: 42, 17, 10, 34, 15, 21, 15, 14
Answer: 21