Keystones — Cornerstone
Five GCSE retrieval questions · 7 April 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄3 + 5⁄6
Answer: 7⁄6 -
2. Algebra Two-step equations
Solve: 4x + 10 = 30
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Divide 95 in the ratio 1:2:2
Answer: 19, 38 and 38 -
5. Statistics Mean
Find the mean of: 16, 9, 17
Answer: 14