Keystones — Cornerstone
Five GCSE retrieval questions · 17 April 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄10 + 2⁄10
Answer: 9⁄10 -
2. Algebra Two-step equations
Solve: 5x + 8 = 38
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Share 120 in the ratio 2:1
Answer: 80 and 40 -
5. Statistics Mean
Calculate the mean of: 30, 36, 27, 48, 9, 10, 29, 31
Answer: 27.5