Keystones — Lintel
Five GCSE retrieval questions · 12 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
18000
Answer: 1.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 41°. Find opposite
Answer: 25.2cm -
4. Ratio Mixed ratio problems
Simplify: 18:15:6
Answer: 6:5:2 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 49, 44, 46, what is the missing number?
Answer: -43