Keystones — Cornerstone
Five GCSE retrieval questions · 7 July 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄5 + 4⁄7
Answer: 48⁄35 -
2. Algebra Two-step equations
Solve: 7x - 16 = 61
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Divide 120 in the ratio 1:2:1
Answer: 30, 60 and 30 -
5. Statistics Mean
Calculate the mean of: 7, 17, 48, 30, 40, 38, 16
Answer: 28