Keystones — Cornerstone
Five GCSE retrieval questions · 18 February 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄12 + 5⁄12
Answer: 2⁄3 -
2. Algebra Two-step equations
Solve: 2x + 3 = 13
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 8cm and b = 7cm. Give your answer to 2 decimal places
Answer: 10.63cm -
4. Ratio Sharing in a ratio
Divide 66 in the ratio 1:2:3
Answer: 11, 22 and 33 -
5. Statistics Mean
Find the mean of: 5, 5, 21, 17
Answer: 12