Keystones — Lintel
Five GCSE retrieval questions · 16 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
85000
Answer: 8.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 58°. Find opposite
Answer: 16cm -
4. Ratio Mixed ratio problems
Simplify: 6:15:18
Answer: 2:5:6 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 31, 32, 35, 38, what is the missing number?
Answer: 24