Keystones — Cornerstone
Five GCSE retrieval questions · 10 June 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 6⁄7 + 4⁄5
Answer: 58⁄35 -
2. Algebra Two-step equations
Solve: 4x + 14 = 26
Answer: x = 3 -
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 80 in the ratio 2:1:1
Answer: 40, 20 and 20 -
5. Statistics Mean
Find the mean of: 17, 18, 10, 17, 13
Answer: 15