Keystones — Lintel
Five GCSE retrieval questions · 11 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
82000000
Answer: 8.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 44°. Find opposite
Answer: 20.3cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 1:4:3
Answer: 22, 88 and 66 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 46, 23, 17, 45, 16, what is the missing number?
Answer: 69