Keystones — Cornerstone
Five GCSE retrieval questions · 23 April 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄10 + 5⁄10
Answer: 9⁄10 -
2. Algebra Two-step equations
Solve: 3x + 3 = 30
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 36cm
Answer: 39cm -
4. Ratio Sharing in a ratio
Share 65 in the ratio 2:3
Answer: 26 and 39 -
5. Statistics Mean
Calculate the mean of: 35, 33, 14, 17, 6, 10. Give your answer to 2 decimal places
Answer: 19.17