Keystones — Cornerstone
Five GCSE retrieval questions · 8 April 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄7 + 4⁄8
Answer: 15⁄14 -
2. Algebra Two-step equations
Solve: 7x - 9 = 82
Answer: x = 13 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 36cm
Answer: 39cm -
4. Ratio Sharing in a ratio
Divide 160 in the ratio 1:2:1
Answer: 40, 80 and 40 -
5. Statistics Mean
Calculate the mean of: 25, 14, 38, 24, 11, 19, 34
Answer: 23.6