Keystones — Cornerstone
Five GCSE retrieval questions · 15 November 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄5 + 2⁄3
Answer: 16⁄15 -
2. Algebra Two-step equations
Solve: 4x - 20 = 20
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 6cm and 8cm
Answer: 10cm -
4. Ratio Sharing in a ratio
Divide 128 in the ratio 3:4:1
Answer: 48, 64 and 16 -
5. Statistics Mean
Find the mean of: 4, 17, 9
Answer: 10