Keystones — Lintel
Five GCSE retrieval questions · 20 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
66000000
Answer: 6.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 39°. Find opposite
Answer: 19.4cm -
4. Ratio Mixed ratio problems
Divide 192 in the ratio 1:4:3
Answer: 24, 96 and 72 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 40, 18, 40, 29, 19, what is the missing number?
Answer: 16