Keystones — Cornerstone
Five GCSE retrieval questions · 15 August 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 6⁄7 + 2⁄8
Answer: 31⁄28 -
2. Algebra Two-step equations
Solve: 6x + 5 = 29
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 20cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Divide 136 in the ratio 3:1:4
Answer: 51, 17 and 68 -
5. Statistics Mean
Find the mean of: 19, 2, 15
Answer: 12