Keystones — Cornerstone
Five GCSE retrieval questions · 13 September 2014 · mathsvault.uk/keystones
-
1. Number Adding fractions
Add: 3⁄4 + 3⁄5
Answer: 27⁄20 -
2. Algebra Two-step equations
Solve: 8x - 16 = 40
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Share 30 in the ratio 1:2
Answer: 10 and 20 -
5. Statistics Mean
Calculate the mean of: 20, 26, 24, 24, 13, 20. Give your answer to 2 decimal places
Answer: 21.17