Keystones — Cornerstone
Five GCSE retrieval questions · 25 December 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄9 + 3⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 2x + 6 = 28
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 40cm
Answer: 41cm -
4. Ratio Sharing in a ratio
Divide 112 in the ratio 3:2:3
Answer: 42, 28 and 42 -
5. Statistics Mean
Find the mean of: 18, 8, 7, 19, 4
Answer: 11.2