Keystones — Cornerstone
Five GCSE retrieval questions · 21 July 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄5 + 3⁄4
Answer: 27⁄20 -
2. Algebra Two-step equations
Solve: 5x + 8 = 58
Answer: x = 10 -
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 30 in the ratio 2:1
Answer: 20 and 10 -
5. Statistics Mean
Calculate the mean of: 25, 37, 31, 41, 26, 29, 45. Give your answer to 2 decimal places
Answer: 33.43