Keystones — Cornerstone
Five GCSE retrieval questions · 3 August 2011 · mathsvault.uk/keystones
-
1. Number Adding fractions
Calculate: 3⁄9 + 2⁄9
Answer: 5⁄9 -
2. Algebra Two-step equations
Solve: 7x + 4 = 74
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 10cm. Give your answer to 2 decimal places
Answer: 13.45cm -
4. Ratio Sharing in a ratio
Divide 175 in the ratio 3:3:1
Answer: 75, 75 and 25 -
5. Statistics Mean
Find the mean of: 2, 3, 20, 11
Answer: 9