Keystones — Lintel
Five GCSE retrieval questions · 8 April 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 69 + ? = 139
Answer: 70 -
2. Algebra
For y = x³ + 9, calculate y when x = 2
Answer: y = 17 -
3. Geometry
Opposite = 12cm, adjacent = 20cm. Calculate the angle
Answer: 31° -
4. Ratio
Calculate 43.6% of 435
Answer: 189.66 -
5. Statistics
A bag has 8 red and 4 blue balls. What is the probability of picking a red ball?
Answer: 2⁄3