Keystones — Cornerstone
Five GCSE retrieval questions · 1 February 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄7 + 7⁄8
Answer: 73⁄56 -
2. Algebra Two-step equations
Solve: 6x + 13 = 31
Answer: x = 3 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 161 in the ratio 1:3:3
Answer: 23, 69 and 69 -
5. Statistics Mean
Find the mean of: 4, 18, 2, 20
Answer: 11