Keystones — Lintel
Five GCSE retrieval questions · 15 July 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 629 + 792
Answer: 629 + 792 = 1421 -
2. Algebra
For y = x³ + 15, calculate y when x = 3
Answer: y = 42 -
3. Geometry
Opposite = 20cm, adjacent = 17cm. Calculate the angle
Answer: 49.6° -
4. Ratio
Find 60% of 381
Answer: 228.6 -
5. Statistics
A bag has 7 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 7⁄15