Keystones — Cornerstone
Five GCSE retrieval questions · 5 May 2020 · mathsvault.uk/keystones
-
1. Number Adding fractions
Add: 3⁄7 + 2⁄3
Answer: 23⁄21 -
2. Algebra Two-step equations
Solve: 8x - 13 = 91
Answer: x = 13 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 9cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 216 in the ratio 3:4:1
Answer: 81, 108 and 27 -
5. Statistics Mean
Find the mean of: 9, 7, 16, 15
Answer: 11.75