Keystones — Lintel
Five GCSE retrieval questions · 29 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
93000000
Answer: 9.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 39°. Find opposite
Answer: 15.4cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 21, 17, 18, 22, 41, what is the missing number?
Answer: 79