Keystones — Cornerstone
Five GCSE retrieval questions · 11 July 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄5 + 3⁄6
Answer: 7⁄10 -
2. Algebra Two-step equations
Solve: 4x + 12 = 40
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 6cm and 8cm
Answer: 10cm -
4. Ratio Sharing in a ratio
Divide 144 in the ratio 2:3:1
Answer: 48, 72 and 24 -
5. Statistics Mean
Find the mean of: 3, 13, 16, 12, 11
Answer: 11