Keystones — Cornerstone
Five GCSE retrieval questions · 31 October 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 513 + 822
Answer: 513 + 822 = 1335 -
2. Algebra
Factorise: 20x + 15
Answer: 5(4x + 3) -
3. Geometry
Find the hypotenuse of a right triangle with sides 6cm and 8cm
Answer: 10cm -
4. Ratio
Calculate 25% of 47
Answer: 11.75 -
5. Statistics
Calculate the mean of: 48, 13, 20, 31, 24, 18, 50
Answer: 29.1