Keystones — Cornerstone
Five GCSE retrieval questions · 16 October 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 5⁄6 + 3⁄7
Answer: 53⁄42 -
2. Algebra Two-step equations
Solve: 2x + 3 = 17
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 8cm
Answer: 13.6cm -
4. Ratio Sharing in a ratio
Divide 175 in the ratio 3:1:3
Answer: 75, 25 and 75 -
5. Statistics Mean
Calculate the mean of: 16, 24, 23, 50, 46, 43, 21, 26
Answer: 31.1