Keystones — Cornerstone
Five GCSE retrieval questions · 15 October 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄5 + 3⁄7
Answer: 43⁄35 -
2. Algebra Two-step equations
Solve: 8x - 14 = 66
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 35cm
Answer: 37cm -
4. Ratio Sharing in a ratio
Share 20 in the ratio 3:1
Answer: 15 and 5 -
5. Statistics Mean
Find the mean of: 6, 7, 15, 19, 13
Answer: 12