Keystones — Cornerstone
Five GCSE retrieval questions · 18 January 2014 · mathsvault.uk/keystones
-
1. Number Adding fractions
Calculate: 6⁄11 + 3⁄11
Answer: 9⁄11 -
2. Algebra Two-step equations
Solve: 2x + 8 = 28
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places
Answer: 12.21cm -
4. Ratio Sharing in a ratio
Divide 160 in the ratio 3:2:3
Answer: 60, 40 and 60 -
5. Statistics Mean
Calculate the mean of: 24, 13, 30, 15, 48, 11, 23. Give your answer to 2 decimal places
Answer: 23.43