Keystones — Cornerstone
Five GCSE retrieval questions · 14 September 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄10 + 1⁄10
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 8x - 19 = 61
Answer: x = 10 -
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 100 in the ratio 3:2
Answer: 60 and 40 -
5. Statistics Mean
Calculate the mean of: 6, 7, 45, 6, 17, 25
Answer: 17.7