Keystones — Cornerstone
Five GCSE retrieval questions · 2 December 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄5 + 1⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 6x + 3 = 51
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 16cm
Answer: 20cm -
4. Ratio Sharing in a ratio
Divide 120 in the ratio 1:2:2
Answer: 24, 48 and 48 -
5. Statistics Mean
Find the mean of: 12, 13, 25, 2
Answer: 13