Keystones — Cornerstone
Five GCSE retrieval questions · 28 February 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 5⁄7 + 1⁄4
Answer: 27⁄28 -
2. Algebra Two-step equations
Solve: 7x + 5 = 47
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Divide 98 in the ratio 3:2:2
Answer: 42, 28 and 28 -
5. Statistics Mean
Find the mean of: 16, 18, 11
Answer: 15