Keystones — Lintel
Five GCSE retrieval questions · 9 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
300000
Answer: 3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 40°. Find opposite
Answer: 8.4cm -
4. Ratio Mixed ratio problems
Divide 84 in the ratio 4:2:1
Answer: 48, 24 and 12 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 33, 33, 35, what is the missing number?
Answer: 31