Keystones — Cornerstone
Five GCSE retrieval questions · 21 March 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄4 + 6⁄8
Answer: 5⁄4 -
2. Algebra Two-step equations
Solve: 2x + 8 = 18
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 5cm and 12cm
Answer: 13cm -
4. Ratio Sharing in a ratio
Share 48 in the ratio 1:2
Answer: 16 and 32 -
5. Statistics Mean
Calculate the mean of: 29, 41, 44, 50, 33, 13
Answer: 35