Keystones — Lintel
Five GCSE retrieval questions · 5 September 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 65 + ? = 131
Answer: 66 -
2. Algebra
For y = x³ + 4, calculate y when x = 2
Answer: y = 12 -
3. Geometry
Calculate the hypotenuse when a = 6cm and b = 9cm
Answer: 10.82cm -
4. Ratio
Find 24% of 251
Answer: 60.24 -
5. Statistics
A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 6⁄11