Keystones — Cornerstone
Five GCSE retrieval questions · 6 March 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄10 + 3⁄10
Answer: 1⁄2 -
2. Algebra Two-step equations
Solve: 7x - 7 = 35
Answer: x = 6 -
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 80 in the ratio 3:1:1
Answer: 48, 16 and 16 -
5. Statistics Mean
Calculate the mean of: 16, 41, 15, 41, 32, 31, 5, 45
Answer: 28.25