Keystones — Cornerstone
Five GCSE retrieval questions · 22 April 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄4 + 2⁄3
Answer: 11⁄12 -
2. Algebra Two-step equations
Solve: 4x + 9 = 29
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 99 in the ratio 4:3:2
Answer: 44, 33 and 22 -
5. Statistics Mean
Calculate the mean of: 30, 25, 23, 40, 43, 6, 25. Give your answer to 2 decimal places
Answer: 27.43