Keystones — Lintel
Five GCSE retrieval questions · 31 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.096
Answer: 9.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 48°. Find opposite
Answer: 23.3cm -
4. Ratio Mixed ratio problems
Divide 91 in the ratio 4:1:2
Answer: 52, 13 and 26 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 30, 16, 20, 49, 24, what is the missing number?
Answer: 77