Keystones — Cornerstone
Five GCSE retrieval questions · 12 July 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄6 + 5⁄8
Answer: 9⁄8 -
2. Algebra Two-step equations
Solve: 3x + 12 = 48
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 7cm and 24cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Share 75 in the ratio 4:1
Answer: 60 and 15 -
5. Statistics Mean
Calculate the mean of: 10, 26, 33, 15, 34, 19, 32, 47
Answer: 27