Keystones — Cornerstone
Five GCSE retrieval questions · 1 November 2015 · mathsvault.uk/keystones
-
1. Number Adding fractions
Calculate: 2⁄7 + 4⁄7
Answer: 6⁄7 -
2. Algebra Two-step equations
Solve: 5x + 4 = 39
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 6cm. Give your answer to 2 decimal places
Answer: 10.82cm -
4. Ratio Sharing in a ratio
Divide 126 in the ratio 4:4:1
Answer: 56, 56 and 14 -
5. Statistics Mean
Calculate the mean of: 11, 18, 19, 35, 37, 25. Give your answer to 2 decimal places
Answer: 24.17