Keystones — Cornerstone
Five GCSE retrieval questions · 2 June 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄3 + 1⁄4
Answer: 7⁄12 -
2. Algebra Two-step equations
Solve: 3x + 7 = 16
Answer: x = 3 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Share 60 in the ratio 2:3
Answer: 24 and 36 -
5. Statistics Mean
Calculate the mean of: 46, 22, 27, 35, 31, 33. Give your answer to 2 decimal places
Answer: 32.33