Keystones — Lintel
Five GCSE retrieval questions · 3 April 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 93 + ? = 107
Answer: 14 -
2. Algebra
Factorise: 3x² + 4x
Answer: x(3x + 4) -
3. Geometry
Opposite = 12cm, adjacent = 17cm. Calculate the angle
Answer: 35.2° -
4. Ratio
Calculate 36.8% of 544
Answer: 200.19 -
5. Statistics
A bag has 6 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 6⁄13