Keystones — Cornerstone
Five GCSE retrieval questions · 4 May 2013 · mathsvault.uk/keystones
-
1. Number Adding fractions
Add: 1⁄6 + 2⁄5
Answer: 17⁄30 -
2. Algebra Two-step equations
Solve: 6x - 19 = 23
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 12cm. Give your answer to 2 decimal places
Answer: 13.42cm -
4. Ratio Sharing in a ratio
Divide 180 in the ratio 4:3:3
Answer: 72, 54 and 54 -
5. Statistics Mean
Find the mean of: 10, 20, 8, 11, 21
Answer: 14