Keystones — Cornerstone
Five GCSE retrieval questions · 27 January 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄5 + 1⁄3
Answer: 14⁄15 -
2. Algebra Two-step equations
Solve: 8x - 6 = 82
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 16cm
Answer: 20cm -
4. Ratio Sharing in a ratio
Divide 88 in the ratio 3:1:4
Answer: 33, 11 and 44 -
5. Statistics Mean
Calculate the mean of: 40, 50, 30, 36, 17, 36, 42. Give your answer to 2 decimal places
Answer: 35.86