Keystones — Cornerstone
Five GCSE retrieval questions · 6 September 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄3 + 3⁄4
Answer: 17⁄12 -
2. Algebra Two-step equations
Solve: 7x - 6 = 57
Answer: x = 9 -
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 90 in the ratio 1:4
Answer: 18 and 72 -
5. Statistics Mean
Calculate the mean of: 37, 6, 9, 45, 14, 17, 10. Give your answer to 2 decimal places
Answer: 19.71