Keystones — Cornerstone
Five GCSE retrieval questions · 11 August 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄12 + 5⁄12
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 4x - 9 = 39
Answer: x = 12 -
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 160 in the ratio 3:2:3
Answer: 60, 40 and 60 -
5. Statistics Mean
Find the mean of: 10, 13, 19
Answer: 14