Keystones — Cornerstone
Five GCSE retrieval questions · 16 October 2016 · mathsvault.uk/keystones
-
1. Number Adding fractions
Calculate: 2⁄7 + 2⁄7
Answer: 4⁄7 -
2. Algebra Two-step equations
Solve: 4x + 3 = 39
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 36cm
Answer: 39cm -
4. Ratio Sharing in a ratio
Divide 120 in the ratio 2:1:1
Answer: 60, 30 and 30 -
5. Statistics Mean
Calculate the mean of: 21, 18, 7, 14, 32, 16
Answer: 18